| abactinal | (adjective) (of radiate animals) located on the surface or end opposite to that on which the mouth is situated | - |
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| abdominal | (adjective) of or relating to or near the abdomen | - |
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| (noun) the muscles of the abdomen | Synonyms: ab, abdominal muscle |
| aboriginal | (adjective) characteristic of or relating to people inhabiting a region from the beginning | Synonyms: native |
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| (adjective) having existed from the beginning; in an earliest or original stage or state | Synonyms: primaeval, primal, primeval, primordial |
| (noun) an indigenous person who was born in a particular place | Synonyms: aborigine, indigen, indigene, native |
| accessional | (adjective) of or constituting an accession | - |
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| accommodational | (adjective) of or relating to the accommodation of the lens of the eye | - |
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| acculturational | (adjective) of or relating to acculturation | Synonyms: acculturative |
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| actinal | (adjective) (of radiate organisms) located on the surface or end on which the mouth is situated | - |
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| adaptational | (adjective) of or relating to adaptation | - |
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| additional | (adjective) further or added | Synonyms: extra |
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| adrenal | (adjective) of or pertaining to the adrenal glands or their secretions | - |
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| (adjective) near the kidneys | - |
| (noun) either of a pair of complex endocrine glands situated near the kidney | Synonyms: adrenal gland, suprarenal gland |
| affectional | (adjective) characterized by emotion | Synonyms: affective, emotive |
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| affinal | (adjective) (anthropology) related by marriage | Synonyms: affine |
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| agonal | (adjective) pertaining to or associated with agony (especially death agonies) | - |
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| albinal | (adjective) of or pertaining to or affected by albinism | Synonyms: albinic, albinistic, albinotic |
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| altitudinal | (adjective) pertaining to altitude | - |
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| ammonal | (noun) Ammonal is an explosive made up of ammonium nitrate and aluminum powder. | - |
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| anaclinal | (adjective) of valleys and rivers; progressing in a direction opposite to the dip in surrounding rock strata | - |
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| anal | (adjective) a stage in psychosexual development when the child's interest is concentrated on the anal region; fixation at this stage is said to result in orderliness, meanness, stubbornness, compulsiveness, etc. | Synonyms: anal retentive |
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| (adjective) of or related to the anus | - |
| anginal | (adjective) of or related to the pain of angina pectoris | Synonyms: anginose, anginous |
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| annexational | (adjective) relating to annexation | - |
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| antennal | (adjective) of or relating to antennae | Synonyms: antennary |
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| anticlinal | (adjective) sloping downward away from a common crest | - |
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| antiphonal | (adjective) containing or using responses; alternating | Synonyms: responsive |
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| (adjective) relating to or resembling an antiphon or antiphony | Synonyms: antiphonary |
| (noun) bound collection of antiphons | Synonyms: antiphonary |
| apparitional | (adjective) resembling or characteristic of a phantom | Synonyms: ghostlike, ghostly, phantasmal, spectral, spiritual |
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| appositional | (adjective) relating to or being in apposition | Synonyms: appositive |
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| aptitudinal | (adjective) of or relating to aptitudes | - |
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| arbitrational | (adjective) relating to or resulting from arbitration | Synonyms: arbitral |
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| archidiaconal | (adjective) of or relating to an archdeacon or his office | - |
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| arsenal | (noun) a military structure where arms and ammunition and other military equipment are stored and training is given in the use of arms | Synonyms: armory, armoury |
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| (noun) a place where arms are manufactured | Synonyms: armory, armoury |
| (noun) all the weapons and equipment that a country has | Synonyms: armory, armoury |
| ascensional | (adjective) tending to rise | - |
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| associational | (adjective) of or relating to associations or associationism | - |
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| asternal | (adjective) not connected to the sternum or breastbone | - |
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| atonal | (adjective) characterized by avoidance of traditional western tonality | Synonyms: unkeyed |
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| attentional | (adjective) of or relating to attention | - |
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| attitudinal | (adjective) of or relating to attitudes | - |
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| attritional | (adjective) relating to or caused by attrition | - |
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| autochthonal | (adjective) originating where it is found | Synonyms: autochthonic, autochthonous, endemic, indigenous |
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| autumnal | (adjective) of or characteristic of or occurring in autumn | - |
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| (adjective) characteristic of late maturity verging on decline | - |
| avifaunal | (adjective) of or relating to birds of a particular region or period | Synonyms: avifaunistic |
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| avocational | (adjective) of or involved in an avocation | - |
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| axonal | (adjective) of or relating to or resembling an axon | - |
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| azonal | (adjective) not divided into zones | - |
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| bacchanal | (adjective) used of riotously drunken merrymaking | Synonyms: bacchanalian, bacchic, carousing, orgiastic |
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| (noun) a wild gathering involving excessive drinking and promiscuity | Synonyms: bacchanalia, debauch, debauchery, drunken revelry, orgy, riot, saturnalia |
| (noun) someone who engages in drinking bouts | Synonyms: bacchant, drunken reveler, drunken reveller |
| (noun) a drunken reveller; a devotee of Bacchus | Synonyms: bacchant |
| banal | (adjective) repeated too often; overfamiliar through overuse | Synonyms: commonplace, hackneyed, old-hat, shopworn, stock, threadbare, timeworn, tired, trite, well-worn |
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| basinal | (adjective) of or relating to a basin | - |
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| bidirectional | (adjective) reactive or functioning or allowing movement in two usually opposite directions | - |
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| bigeminal | (adjective) occurring in pairs | - |
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| binominal | (adjective) having or characterized by two names, especially those of genus and species in taxonomies | Synonyms: binomial |
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| bisectional | (adjective) of or relating to bisection | - |
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| bizonal | (adjective) relating to or concerned with the combined affairs of two administrative zones | - |
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| botulinal | (adjective) of or relating to or produced by the botulinus | - |
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| cacuminal | (adjective) pronounced with the tip of the tongue turned back toward the hard palate | Synonyms: retroflex |
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| calycinal | (adjective) of or relating to or resembling a calyx | Synonyms: calyceal, calycine |
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| canal | (noun) long and narrow strip of water made for boats or for irrigation | - |
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| (noun) a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance | Synonyms: channel, duct, epithelial duct |
| (noun) (astronomy) an indistinct surface feature of Mars once thought to be a system of channels; they are now believed to be an optical illusion | - |
| (verb) provide (a city) with a canal | Synonyms: canalise, canalize |
| cantonal | (adjective) of or relating to a canton | - |
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| cardinal | (adjective) being or denoting a numerical quantity but not order | - |
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| (adjective) serving as an essential component | Synonyms: central, fundamental, key, primal |
| (noun) crested thick-billed North American finch having bright red plumage in the male | Synonyms: cardinal grosbeak, Cardinalis cardinalis, redbird, Richmondena Cardinalis |
| (noun) a variable color averaging a vivid red | Synonyms: carmine |
| (noun) (Roman Catholic Church) one of a group of more than 100 prominent bishops in the Sacred College who advise the Pope and elect new Popes | - |
| (noun) the number of elements in a mathematical set; denotes a quantity but not the order | Synonyms: cardinal number |
| carinal | (adjective) relating to or resembling a carina | - |
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| carnal | (adjective) of or relating to the body or flesh | - |
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| (adjective) marked by the appetites and passions of the body | Synonyms: animal, fleshly, sensual |
| cataclinal | (adjective) of valleys and rivers; running in the direction of the dip in surrounding rock strata | - |
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| cerebrospinal | (adjective) of or relating to the brain and spinal cord | - |
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| chanal | (noun) thorny shrub or small tree common in central Argentina having small orange or yellow flowers followed by edible berries | Synonyms: chanar, Geoffroea decorticans |
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| clonal | (adjective) of or relating to a clone | - |
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| coeducational | (adjective) attended by members of both sexes | Synonyms: co-ed |
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| combinational | (adjective) able to or tending to combine | Synonyms: combinable, combinatory |
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| communal | (adjective) relating to a small administrative district or community | - |
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| (adjective) for or by a group rather than individuals | - |
| communicational | (adjective) used in communication | - |
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| compositional | (adjective) arranging or grouping | - |
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| computational | (adjective) of or involving computation or computers | - |
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| conceptional | (adjective) being of the nature of a notion or concept | Synonyms: ideational, notional |
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| conditional | (adjective) imposing or depending on or containing a condition | - |
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| (adjective) qualified by reservations | - |
| confessional | (noun) a booth where a priest sits to hear confessions | - |
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| configurational | (adjective) of or relating to or characterized by configuration | - |
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| confrontational | (adjective) of or relating to confrontation | - |
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| congregational | (adjective) relating to or conducted or participated in by a congregation | - |
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| congressional | (adjective) of or relating to congress | - |
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| connotational | (adjective) of or relating to a connotation | Synonyms: connotative of |
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| constitutional | (adjective) sanctioned by or consistent with or operating under the law determining the fundamental political principles of a government | - |
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| (adjective) of benefit to or intended to benefit your physical makeup | - |
| (adjective) constitutional in the structure of something (especially your physical makeup) | Synonyms: constituent, constitutive, organic |
| (adjective) existing as an essential constituent or characteristic | Synonyms: built-in, inbuilt, inherent, integral |
| (noun) a regular walk taken as a form of exercise | - |
| consuetudinal | (noun) a manual describing the customs of a particular group (especially the ceremonial practices of a monastic order) | Synonyms: consuetudinary |
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| conventional | (adjective) following accepted customs and proprieties | - |
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| (adjective) unimaginative and conformist | - |
| (adjective) (weapons) using energy for propulsion or destruction that is not nuclear energy | - |
| (adjective) rigidly formal or bound by convention | Synonyms: ceremonious |
| (adjective) represented in simplified or symbolic form | Synonyms: formal, schematic |
| (adjective) conforming with accepted standards | Synonyms: established |
| (adjective) in accord with or being a tradition or practice accepted from the past | - |
| conversational | (adjective) characteristic of informal spoken language or conversation | Synonyms: colloquial |
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| coronal | (noun) flower arrangement consisting of a circular band of foliage or flowers for ornamental purposes | Synonyms: chaplet, garland, lei, wreath |
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| correctional | (adjective) concerned with or providing correction | - |
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| correlational | (adjective) relating to or employing correlation | - |
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| criminal | (adjective) guilty of crime or serious offense | - |
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| (adjective) involving or being or having the nature of a crime | Synonyms: felonious |
| (adjective) bringing or deserving severe rebuke or censure | Synonyms: condemnable, deplorable, reprehensible, vicious |
| (noun) someone who has committed a crime or has been legally convicted of a crime | Synonyms: crook, felon, malefactor, outlaw |
| criterional | (adjective) serving as a basis for evaluation | Synonyms: criterial |
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| cyclonal | (adjective) of or relating to or characteristic of a violent tropical storm | Synonyms: cyclonic, cyclonical |
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| (adjective) of or relating to or characteristic of the atmosphere around a low pressure center | Synonyms: cyclonic, cyclonical |
| decompositional | (adjective) causing organic decay | - |
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| deformational | (adjective) relating to or causing change in either shape or size of a material body or geometric figure | - |
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| delusional | (adjective) suffering from or characterized by delusions | - |
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| denominational | (adjective) adhering or confined to a particular sect or denomination | - |
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| (adjective) relating to or characteristic of a particular religious denomination | - |
| (adjective) relating to the face value of a banknote, coin, or stamp | - |
| derivational | (adjective) characterized by inflections indicating a semantic relation between a word and its base | - |
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| devotional | (adjective) relating to worship | - |
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| (noun) a short religious service | - |
| diagonal | (adjective) having an oblique or slanted direction | Synonyms: aslant, aslope, slanted, slanting, sloped, sloping |
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| (adjective) connecting two nonadjacent corners of a plane figure or any two corners of a solid that are not in the same face | - |
| (noun) a punctuation mark (/) used to separate related items of information | Synonyms: separatrix, slash, solidus, stroke, virgule |
| (noun) an oblique line of squares of the same color on a checkerboard | - |
| (noun) (mathematics) a set of entries in a square matrix running diagonally either from the upper left to lower right entry or running from the upper right to lower left entry | - |
| (noun) a line or cut across a fabric that is not at right angles to a side of the fabric | Synonyms: bias |
| (noun) (geometry) a straight line connecting any two vertices of a polygon that are not adjacent | - |
| dimensional | (adjective) of or relating to dimensions | - |
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| (adjective) having dimension--the quality or character or stature proper to a person | - |
| directional | (adjective) relating to or indicating directions in space | - |
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| (adjective) relating to direction toward a (nonspatial) goal | - |
| (adjective) showing the way by conducting or leading; imposing direction on | Synonyms: directing, directive, guiding |
| disciplinal | (adjective) designed to promote discipline | Synonyms: corrective, disciplinary |
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| discretional | (adjective) having or using the ability to act or decide according to your own discretion or judgment | Synonyms: discretionary |
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| disproportional | (adjective) out of proportion | Synonyms: disproportionate |
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| distributional | (adjective) of or relating to spatial distribution | - |
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| diurnal | (adjective) of or belonging to or active during the day | - |
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| (adjective) having a daily cycle or occurring every day | - |