| algarobilla | (noun) mesquite pod used in tanning and dyeing | Synonyms: algarroba, algarrobilla |
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| algarrobilla | (noun) mesquite pod used in tanning and dyeing | Synonyms: algarobilla, algarroba |
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| allamanda | (noun) a plant of the genus Allamanda having large showy funnel-shaped flowers in terminal cymes | - |
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| allantoic | (adjective) relating to or characterized by an allantois | - |
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| allantoid | (adjective) shaped like a sausage | Synonyms: sausage-shaped |
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| allantois | (noun) the vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals) | - |
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| allargando | (adjective) (music) gradually decreasing in tempo and broadening in manner | - |
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| allay | (verb) satisfy (thirst) | Synonyms: assuage, quench, slake |
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| (verb) lessen the intensity of or calm | Synonyms: ease, relieve, still |
| allayer | (noun) a person who reduces the intensity (e.g., of fears) and calms and pacifies | Synonyms: comforter, reliever |
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| ampulla | (noun) a flask that has two handles; used by Romans for wines or oils | - |
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| (noun) the dilated portion of a canal or duct especially of the semicircular canals of the ear | - |
| ampullar | (adjective) of or related to an ampulla | Synonyms: ampullary |
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| ampullary | (adjective) of or related to an ampulla | Synonyms: ampullar |
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| ancillary | (adjective) furnishing added support | Synonyms: accessory, adjunct, adjuvant, appurtenant, auxiliary |
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| appellant | (adjective) of or relating to or taking account of appeals (usually legal appeals) | Synonyms: appellate |
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| (noun) the party who appeals a decision of a lower court | Synonyms: plaintiff in error |
| appellate | (adjective) of or relating to or taking account of appeals (usually legal appeals) | Synonyms: appellant |
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| appellation | (noun) identifying word or words by which someone or something is called and classified or distinguished from others | Synonyms: appellative, denomination, designation |
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| (noun) a geographical indication used to identify where the grapes for a wine are grown | - |
| appellative | (adjective) pertaining to or dealing with or used as a common noun | - |
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| (adjective) inclined to or serving for the giving of names | Synonyms: naming |
| (noun) identifying word or words by which someone or something is called and classified or distinguished from others | Synonyms: appellation, denomination, designation |
| arcella | (noun) an amoeba-like protozoan with a chitinous shell resembling an umbrella | - |
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| argillaceous | (adjective) resembling or containing clay | Synonyms: clayey |
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| arillate | (adjective) (of some seeds) having a fleshy and usually brightly colored cover | Synonyms: ariled |
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| armilla | (noun) (archeology) a bracelet worn around the wrist or arm | - |
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| (noun) a celestial globe consisting of metal hoops; used by early astronomers to determine the positions of stars | Synonyms: armillary sphere |
| armillary | (adjective) of or relating to bracelets | - |
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| avellan | (adjective) pertaining to filberts or hazelnuts | Synonyms: avellane |
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| avellane | (adjective) pertaining to filberts or hazelnuts | Synonyms: avellan |
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| axilla | (noun) the hollow under the arm where it is joined to the shoulder | Synonyms: armpit, axillary cavity, axillary fossa |
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| axillary | (adjective) of or relating to the armpit | - |
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| (adjective) of or relating to the axil | Synonyms: alar |
| ayatollah | (noun) a high-ranking Shiite religious leader who is regarded as an authority on religious law and its interpretation and who has political power as well | - |
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| bacillar | (adjective) relating to or produced by or containing bacilli | Synonyms: bacillary |
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| (adjective) formed like a bacillus | Synonyms: bacillary, bacilliform, baculiform, rod-shaped |
| bacillary | (adjective) relating to or produced by or containing bacilli | Synonyms: bacillar |
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| (adjective) formed like a bacillus | Synonyms: bacillar, bacilliform, baculiform, rod-shaped |
| ballad | (noun) a narrative poem of popular origin | Synonyms: lay |
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| (noun) a narrative song with a recurrent refrain | Synonyms: lay |
| ballade | (noun) a poem consisting of 3 stanzas and an envoy | - |
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| balladeer | (noun) a singer of popular ballads | Synonyms: crooner |
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| ballast | (noun) any heavy material used to stabilize a ship or airship | - |
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| (noun) an electrical device for starting and regulating fluorescent and discharge lamps | Synonyms: light ballast |
| (noun) a resistor inserted into a circuit to compensate for changes (as those arising from temperature fluctuations) | Synonyms: ballast resistor, barretter |
| (noun) an attribute that tends to give stability in character and morals; something that steadies the mind or feelings | - |
| (noun) coarse gravel laid to form a bed for streets and railroads | - |
| (verb) make steady with a ballast | - |
| banderilla | (noun) a decorated dart that is implanted in the neck or shoulders of the bull during a bull fight | - |
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| barbellate | (adjective) having or covered with protective barbs or quills or spines or thorns or setae etc. | Synonyms: barbed, briary, briery, bristled, bristly, burred, burry, prickly, setaceous, setose, spiny, thorny |
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| barilla | (noun) Algerian plant formerly burned to obtain calcium carbonate | Synonyms: Halogeton souda |
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| (noun) bushy plant of Old World salt marshes and sea beaches having prickly leaves; burned to produce a crude soda ash | Synonyms: glasswort, kali, kelpwort, Salsola kali, Salsola soda, saltwort |
| belladonna | (noun) an alkaloidal extract or tincture of the poisonous belladonna plant that is used medicinally | - |
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| (noun) perennial Eurasian herb with reddish bell-shaped flowers and shining black berries; extensively grown in United States; roots and leaves yield atropine | Synonyms: Atropa belladonna, belladonna plant, deadly nightshade |
| bellarmine | (noun) a stoneware drinking jug with a long neck; decorated with a caricature of Cardinal Bellarmine (17th century) | Synonyms: greybeard, long-beard, longbeard |
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| biflagellate | (adjective) having two flagella | - |
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| billabong | (noun) a branch of a river made by water flowing from the main stream only when the water level is high | - |
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| (noun) a stagnant pool of water in the bed of a stream that flows intermittently | - |
| bollard | (noun) a strong post (as on a wharf or quay or ship for attaching mooring lines) | Synonyms: bitt |
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| bouillabaisse | (noun) highly seasoned Mediterranean soup or stew made of several kinds of fish and shellfish with tomatoes and onions or leeks and seasoned with saffron and garlic and herbs | - |
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| bulla | (noun) the round leaden seal affixed to a papal bull | - |
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| (noun) (pathology) an elevation of the skin filled with serous fluid | Synonyms: bleb, blister |
| bullace | (noun) small wild or half-domesticated Eurasian plum bearing small ovoid fruit in clusters | Synonyms: Prunus insititia |
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| bullate | (adjective) of leaves; appearing puckered as if blistered | - |
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| calabazilla | (noun) perennial vine of dry parts of central and southwestern United States and Mexico having small hard mottled green inedible fruit | Synonyms: buffalo gourd, Cucurbita foetidissima, Missouri gourd, prairie gourd, prairie gourd vine, wild pumpkin |
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| calla | (noun) South African plant widely cultivated for its showy pure white spathe and yellow spadix | Synonyms: arum lily, calla lily, Zantedeschia aethiopica |
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| callable | (adjective) subject to a demand for payment before due date | - |
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| callathump | (noun) a noisy mock serenade (made by banging pans and kettles) to a newly married couple | Synonyms: belling, callithump, charivari, chivaree, shivaree |
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| (noun) a noisy boisterous parade | Synonyms: callithump, callithump parade |
| camarilla | (noun) a clique (often secret) that seeks power usually through intrigue | Synonyms: cabal, faction, junto |
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| cancellate | (adjective) having an open or latticed or porous structure | Synonyms: cancellated, cancellous |
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| (adjective) having a latticelike structure pierced with holes or windows | Synonyms: cancellated, clathrate |
| cancellated | (adjective) having an open or latticed or porous structure | Synonyms: cancellate, cancellous |
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| (adjective) having a latticelike structure pierced with holes or windows | Synonyms: cancellate, clathrate |
| cancellation | (noun) the act of cancelling; calling off some arrangement | - |
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| (noun) the speech act of revoking or annulling or making void | - |
| candelilla | (noun) wax-coated shrub of northern Mexico and southwestern United States | Synonyms: Euphorbia antisyphilitica |
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| (noun) wax-coated Mexican shrub related to Euphorbia antisyphilitica | Synonyms: Pedilanthus bracteatus, Pedilanthus pavonis |
| canella | (noun) highly aromatic inner bark of the Canella winterana used as a condiment and a tonic | Synonyms: canella bark, white cinnamon |
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| cantillate | (verb) recite with musical intonation; recite as a chant or a psalm | Synonyms: chant, intonate, intone |
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| cantillation | (noun) liturgical chanting | - |
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| capillarity | (noun) a phenomenon associated with surface tension and resulting in the elevation or depression of liquids in capillaries | Synonyms: capillary action |
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| capillary | (adjective) of or relating to hair | - |
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| (adjective) long and slender with a very small internal diameter | Synonyms: hairlike |
| (noun) a tube of small internal diameter; holds liquid by capillary action | Synonyms: capillary tube, capillary tubing |
| (noun) any of the minute blood vessels connecting arterioles with venules | Synonyms: capillary vessel |
| carpellary | (adjective) belonging to or forming or containing carpels | - |
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| carpellate | (adjective) bearing or consisting of carpels | Synonyms: pistillate |
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| caryophyllaceous | (adjective) of or pertaining to plants of the family Caryophyllaceae | - |
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| cascarilla | (noun) West Indian shrub with aromatic bark | Synonyms: Croton eluteria |
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| castellated | (adjective) having or resembling repeated square indentations like those in a battlement | Synonyms: battlemented, castled, crenelated, embattled |
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| caterpillar | (noun) a wormlike and often brightly colored and hairy or spiny larva of a butterfly or moth | - |
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| cavalla | (noun) large mackerel with long pointed snout; important food and game fish of the eastern Atlantic coast southward to Brazil | Synonyms: cero, king mackerel, Scomberomorus cavalla |
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| cedilla | (noun) a diacritical mark (,) placed below the letter c to indicate that it is pronounced as an s | - |
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| cellar | (noun) the lowermost portion of a structure partly or wholly below ground level; often used for storage | Synonyms: basement |
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| (noun) storage space where wines are stored | Synonyms: wine cellar |
| (noun) an excavation where root vegetables are stored | Synonyms: root cellar |
| cellarage | (noun) a storage area in a cellar | - |
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| (noun) a charge for storing goods in a cellar | - |
| cellaret | (noun) sideboard with compartments for holding bottles | Synonyms: minibar |
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| cerebellar | (adjective) relating to or associated with the cerebellum | - |
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| challah | (noun) (Judaism) a loaf of white bread containing eggs and leavened with yeast; often formed into braided loaves and glazed with eggs before baking | Synonyms: hallah |
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| cherimolla | (noun) large tropical fruit with leathery skin and soft pulp; related to custard apples | Synonyms: cherimoya |
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| chinchilla | (noun) small rodent with soft pearly grey fur; native to the Andes but bred in captivity for fur | Synonyms: Chinchilla laniger |
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| (noun) a thick twilled fabric of wool and cotton | - |
| (noun) the expensive silvery grey fur of the chinchilla | - |
| chlorella | (noun) any alga of the genus Chlorella | - |
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| cholla | (noun) arborescent cacti having very spiny cylindrical stem segments; southwestern United States and Mexico | Synonyms: Opuntia cholla |
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| chorioallantois | (noun) the very vascular fetal membrane composed of the fused chorion and adjacent wall of the allantois | Synonyms: chorioallantoic membrane |
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| christella | (noun) any of several tropical ferns of the genus Christella having thin brittle fronds | - |
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| chuckwalla | (noun) a herbivorous lizard that lives among rocks in the arid parts of southwestern United States and Mexico | Synonyms: Sauromalus obesus |
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| circumvallate | (verb) surround with or as if with a rampart or other fortification | - |
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| collaborate | (verb) work together on a common enterprise or project | Synonyms: cooperate, join forces |
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| (verb) cooperate as a traitor | - |
| collaboration | (noun) act of working jointly | Synonyms: coaction |
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| (noun) act of cooperating traitorously with an enemy that is occupying your country | Synonyms: collaborationism, quislingism |
| collaborationism | (noun) act of cooperating traitorously with an enemy that is occupying your country | Synonyms: collaboration, quislingism |
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| collaborationist | (noun) someone who collaborates with an enemy occupying force | Synonyms: collaborator, quisling |
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| collaborative | (adjective) accomplished by collaboration | - |
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| collaborator | (noun) an associate in an activity or endeavor or sphere of common interest | Synonyms: cooperator, pardner, partner |
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| (noun) someone who collaborates with an enemy occupying force | Synonyms: collaborationist, quisling |
| (noun) someone who assists in a plot | Synonyms: confederate, henchman, partner in crime |
| collage | (noun) a paste-up made by sticking together pieces of paper or photographs to form an artistic image | Synonyms: montage |
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| (noun) any collection of diverse things | - |
| collagen | (noun) a fibrous scleroprotein in bone and cartilage and tendon and other connective tissue; yields gelatin on boiling | - |
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| collagenase | (noun) any enzyme that catalyzes the hydrolysis of collagen and gelatin | - |
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| collagenic | (adjective) relating to or consisting of collagen | Synonyms: collagenous |
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| collagenous | (adjective) relating to or consisting of collagen | Synonyms: collagenic |
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| collapsable | (adjective) capable of collapsing or being collapsed | Synonyms: collapsible |
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| collapse | (noun) the act of throwing yourself down; collapse; sink | Synonyms: flop |
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| (noun) a natural event caused by something suddenly falling down or caving in | - |
| (noun) a sudden large decline of business or the prices of stocks (especially one that causes additional failures) | Synonyms: crash |
| (noun) an abrupt failure of function or complete physical exhaustion | Synonyms: prostration |
| (verb) collapse due to fatigue, an illness, or a sudden attack | Synonyms: break down |
| (verb) lose significance, effectiveness, or value | - |
| (verb) suffer a nervous breakdown | Synonyms: break up, crack, crack up, crock up |
| (verb) break down, literally or metaphorically | Synonyms: break, cave in, fall in, founder, give, give way |
| (verb) fold or close up | - |
| (verb) fall apart | Synonyms: break down, crumble, crumple, tumble |
| (verb) cause to burst | Synonyms: burst |
| collapsible | (adjective) capable of collapsing or being collapsed | Synonyms: collapsable |
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| collar | (noun) the act of apprehending (especially apprehending a criminal) | Synonyms: apprehension, arrest, catch, pinch, taking into custody |
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| (noun) a figurative restraint | Synonyms: leash |
| (noun) a band that fits around the neck and is usually folded over | Synonyms: neckband |
| (noun) necklace that fits tightly around a woman's neck | Synonyms: choker, dog collar, neckband |
| (noun) a band of leather or rope that is placed around an animal's neck as a harness or to identify it | - |
| (noun) the stitching that forms the rim of a shoe or boot | Synonyms: shoe collar |
| (noun) a short ring fastened over a rod or shaft to limit, guide, or secure a machine part | - |
| (noun) anything worn or placed about the neck | - |
| (noun) (zoology) an encircling band or marking around the neck of any animal | - |
| (verb) take into custody | Synonyms: apprehend, arrest, cop, nab, nail, pick up |
| (verb) furnish with a collar | - |
| (verb) seize by the neck or collar | - |
| collarbone | (noun) bone linking the scapula and sternum | Synonyms: clavicle |
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| collard | (noun) variety of kale having smooth leaves | - |
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| collards | (noun) kale that has smooth leaves | Synonyms: collard greens |
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| collarless | (adjective) without a collar | - |
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| collate | (verb) compare critically; of texts | - |
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| (verb) to assemble in proper sequence | - |