| abysm | (noun) a bottomless gulf or pit; any unfathomable (or apparently unfathomable) cavity or chasm or void extending below (often used figuratively) | Synonyms: abyss |
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| abyss | (noun) a bottomless gulf or pit; any unfathomable (or apparently unfathomable) cavity or chasm or void extending below (often used figuratively) | Synonyms: abysm |
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| ambystomid | (noun) small to moderate-sized terrestrial or semiaquatic New World salamander | Synonyms: ambystomid salamander |
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| baby | (noun) a project of personal concern to someone | - |
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| (noun) a very young mammal | - |
| (noun) a very young child (birth to 1 year) who has not yet begun to walk or talk | Synonyms: babe, infant |
| (noun) the youngest member of a group (not necessarily young) | - |
| (noun) an immature childish person | Synonyms: child |
| (noun) an unborn child; a human fetus | - |
| (noun) a beloved person; used as terms of endearment | Synonyms: beloved, darling, dear, dearest, dearie, deary, honey, love, sweetheart, sweetie |
| babygram | (noun) an X-ray of the entire body of an infant. | - |
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| babyhood | (noun) the earliest state of immaturity | Synonyms: infancy |
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| (noun) the early stage of growth or development | Synonyms: early childhood, infancy |
| babyminder | (noun) a person who looks after babies (usually in the person's own home) while the babys' parents are working | Synonyms: baby minder, minder |
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| babysitter | (noun) a person engaged to care for children when the parents are not home | Synonyms: baby-sitter, sitter |
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| babysitting | (noun) the work of a baby sitter; caring for children when their parents are not home | Synonyms: baby sitting |
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| babytalk | (noun) the developing speech of a young child | Synonyms: baby talk |
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| (noun) an adult's imitation of the speech of a young child | Synonyms: baby talk, motherese |
| bilby | (noun) bandicoot with leathery ears like a rabbit | Synonyms: Macrotis lagotis, rabbit-eared bandicoot, rabbit bandicoot |
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| bobby | (noun) an informal term for a British policeman | - |
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| bobbysock | (noun) a sock that reaches just above the ankle | Synonyms: anklet, anklets, bobbysocks |
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| bobbysocks | (noun) a sock that reaches just above the ankle | Synonyms: anklet, anklets, bobbysock |
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| bobbysoxer | (noun) an adolescent girl wearing bobby socks (common in the 1940s) | Synonyms: bobby-socker |
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| bombycid | (noun) moderate-sized Asiatic moth whose larvae feed on mulberry leaves and produce silk | Synonyms: bombycid moth, silkworm moth |
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| booby | (noun) small tropical gannet having a bright bill or bright feet or both | - |
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| (noun) an ignorant or foolish person | Synonyms: boob, dope, dumbbell, dummy, pinhead |
| busby | (noun) tall hat; worn by some British soldiers on ceremonial occasions | Synonyms: bearskin, shako |
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| bushbaby | (noun) agile long-tailed nocturnal African lemur with dense woolly fur and large eyes and ears | Synonyms: bush baby, galago |
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| bycatch | (noun) unwanted marine creatures that are caught in the nets while fishing for another species | Synonyms: by-catch |
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| bye | (noun) a farewell remark | Synonyms: adieu, adios, arrivederci, au revoir, auf wiedersehen, bye-bye, cheerio, good-by, good-bye, good day, goodby, goodbye, sayonara, so long |
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| (noun) an automatic advance to the next round in a tournament without playing an opponent | Synonyms: pass |
| bygone | (noun) past events to be put aside | Synonyms: water under the bridge |
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| bylaw | (noun) a rule adopted by an organization in order to regulate its own affairs and the behavior of its members | - |
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| byname | (noun) a familiar name for a person (often a shortened version of a person's given name) | Synonyms: cognomen, moniker, nickname, sobriquet, soubriquet |
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| bypass | (noun) a highway that encircles an urban area so that traffic does not have to pass through the center | Synonyms: beltway, ring road, ringway |
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| (noun) a conductor having low resistance in parallel with another device to divert a fraction of the current | Synonyms: electrical shunt, shunt |
| (noun) a surgically created shunt (usually around a damaged part) | - |
| bypath | (noun) a side road little traveled (as in the countryside) | Synonyms: byroad, byway |
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| byplay | (noun) incidental activity performed by an actor for dramatic effect | Synonyms: business, stage business |
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| byproduct | (noun) a product made during the manufacture of something else | Synonyms: by-product, spin-off |
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| (noun) a secondary and sometimes unexpected consequence | Synonyms: by-product |
| byre | (noun) a barn for cows | Synonyms: cow barn, cowbarn, cowhouse, cowshed |
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| byrnie | (noun) a long (usually sleeveless) tunic of chain mail formerly worn as defensive armor | Synonyms: hauberk |
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| byroad | (noun) a side road little traveled (as in the countryside) | Synonyms: bypath, byway |
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| byssus | (noun) tuft of strong filaments by which e.g. a mussel makes itself fast to a fixed surface | Synonyms: beard |
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| bystander | (noun) a nonparticipant spectator | - |
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| byte | (noun) a sequence of 8 bits (enough to represent one character of alphanumeric data) processed as a single unit of information | - |
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| byway | (noun) a side road little traveled (as in the countryside) | Synonyms: bypath, byroad |
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| byword | (noun) a condensed but memorable saying embodying some important fact of experience that is taken as true by many people | Synonyms: adage, proverb, saw |
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| byzant | (noun) a gold coin of the Byzantine Empire; widely circulated in Europe in the Middle Ages | Synonyms: bezant, bezzant, solidus |
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| cabby | (noun) someone who drives a taxi for a living | Synonyms: cabdriver, cabman, hack-driver, hack driver, livery driver, taxidriver, taximan |
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| crybaby | (noun) a person given to excessive complaints and crying and whining | Synonyms: bellyacher, complainer, grumbler, moaner, sniveller, squawker, whiner |
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| (noun) a person who lacks confidence, is irresolute and wishy-washy | Synonyms: chicken, wimp |
| cubby | (noun) a small secluded room | Synonyms: cubbyhole, snug, snuggery |
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| cubbyhole | (noun) a small compartment | Synonyms: pigeonhole |
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| (noun) a small secluded room | Synonyms: cubby, snug, snuggery |
| derby | (noun) a felt hat that is round and hard with a narrow brim | Synonyms: bowler, bowler hat, derby hat, plug hat |
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| exabyte | (noun) a unit of information equal to 1024 pebibytes or 2^60 bytes | Synonyms: EB, EiB, exbibyte |
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| (noun) a unit of information equal to 1000 petabytes or 10^18 bytes | Synonyms: EB |
| exbibyte | (noun) a unit of information equal to 1024 pebibytes or 2^60 bytes | Synonyms: EB, EiB, exabyte |
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| gibibyte | (noun) a unit of information equal to 1024 mebibytes or 2^30 (1,073,741,824) bytes | Synonyms: G, GB, GiB, gigabyte |
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| gigabyte | (noun) a unit of information equal to 1024 mebibytes or 2^30 (1,073,741,824) bytes | Synonyms: G, GB, GiB, gibibyte |
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| (noun) a unit of information equal to 1000 megabytes or 10^9 (1,000,000,000) bytes | Synonyms: G, GB |
| goby | (noun) small spiny-finned fish of coastal or brackish waters having a large head and elongated tapering body having the ventral fins modified as a sucker | Synonyms: gudgeon |
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| goodby | (noun) a farewell remark | Synonyms: adieu, adios, arrivederci, au revoir, auf wiedersehen, bye-bye, bye, cheerio, good-by, good-bye, good day, goodbye, sayonara, so long |
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| goodbye | (noun) a farewell remark | Synonyms: adieu, adios, arrivederci, au revoir, auf wiedersehen, bye-bye, bye, cheerio, good-by, good-bye, good day, goodby, sayonara, so long |
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| grubby | (noun) small sculpin of the coast of New England | Synonyms: Myxocephalus aenaeus |
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| hobby | (noun) an auxiliary activity | Synonyms: avocation, by-line, pursuit, sideline, spare-time activity |
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| (noun) small Old World falcon formerly trained and flown at small birds | Synonyms: Falco subbuteo |
| (noun) a child's plaything consisting of an imitation horse mounted on rockers; the child straddles it and pretends to ride | Synonyms: hobbyhorse, rocking horse |
| hobbyhorse | (noun) a child's plaything consisting of an imitation horse mounted on rockers; the child straddles it and pretends to ride | Synonyms: hobby, rocking horse |
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| (noun) a topic to which one constantly reverts | - |
| hobbyism | (noun) a devotion to hobbies | - |
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| hobbyist | (noun) a person who pursues an activity in their spare time for pleasure | - |
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| hubby | (noun) a married man; a woman's partner in marriage | Synonyms: husband, married man |
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| kibibyte | (noun) a unit of information equal to 1024 bytes | Synonyms: K, kB, KB, KiB, kilobyte |
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| kilobyte | (noun) a unit of information equal to 1024 bytes | Synonyms: K, kB, KB, KiB, kibibyte |
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| (noun) a unit of information equal to 1000 bytes | Synonyms: K, kB, KB |
| labyrinth | (noun) complex system of paths or tunnels in which it is easy to get lost | Synonyms: maze |
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| (noun) a complex system of interconnecting cavities; concerned with hearing and equilibrium | Synonyms: inner ear, internal ear |
| labyrinthitis | (noun) inflammation of the inner ear; can cause vertigo and vomiting | Synonyms: otitis interna |
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| labyrinthodont | (noun) an amphibian of the superorder Labyrinthodontia | - |
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| layby | (noun) designated paved area beside a main road where cars can stop temporarily | Synonyms: lay-by, pull-off, rest area, rest stop |
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| lobby | (noun) a large entrance or reception room or area | Synonyms: antechamber, anteroom, entrance hall, foyer, hall, vestibule |
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| (noun) an interest group that tries to influence legislators or bureaucrats to act in their favor, typically through lobbying | Synonyms: advocacy group, lobby group, pressure group, special-interest group, special interest, special interest group, third house |
| (noun) the people who support some common cause or business or principle or sectional interest | - |
| lobbyism | (noun) the practice of lobbying; the activities of a lobbyist | - |
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| lobbyist | (noun) someone who is employed to persuade legislators to vote for legislation that favors the lobbyist's employer | - |
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| lullaby | (noun) the act of singing a quiet song to lull a child to sleep | Synonyms: cradlesong |
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| (noun) a quiet song intended to lull a child to sleep | Synonyms: berceuse, cradlesong |
| mebibyte | (noun) a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes | Synonyms: M, MB, megabyte, MiB |
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| megabyte | (noun) a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes | Synonyms: M, MB, mebibyte, MiB |
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| (noun) a unit of information equal to 1000 kilobytes or 10^6 (1,000,000) bytes | Synonyms: M, MB |
| passerby | (noun) a person who passes by casually or by chance | Synonyms: passer-by, passer |
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| pebibyte | (noun) a unit of information equal to 1024 tebibytes or 2^50 bytes | Synonyms: PB, petabyte, PiB |
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| petabyte | (noun) a unit of information equal to 1024 tebibytes or 2^50 bytes | Synonyms: PB, pebibyte, PiB |
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| (noun) a unit of information equal to 1000 terabytes or 10^15 bytes | Synonyms: PB |
| presbyope | (noun) a person with presbyopia; someone who is farsighted resulting from the progressive loss with aging of the elasticity of the crystalline lens | - |
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| presbyopia | (noun) a reduced ability to focus on near objects caused by loss of elasticity of the crystalline lens after age 45 | Synonyms: farsightedness |
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| presbyter | (noun) an elder in the Presbyterian Church | - |
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| presbytery | (noun) building reserved for the officiating clergy | - |
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| ruby | (noun) a deep and vivid red color | Synonyms: crimson, deep red |
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| (noun) a transparent piece of ruby that has been cut and polished and is valued as a precious gem | - |
| (noun) a transparent deep red variety of corundum; used as a gemstone and in lasers | - |
| rugby | (noun) a form of football played with an oval ball | Synonyms: rugby football, rugger |
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| sassaby | (noun) a large South African antelope; considered the swiftest hoofed mammal | Synonyms: Damaliscus lunatus, topi |
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| sibyl | (noun) (ancient Rome) a woman who was regarded as an oracle or prophet | - |
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| (noun) a woman who tells fortunes | - |
| standby | (noun) something that can be relied on when needed | - |
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| (noun) an actor able to replace a regular performer when required | Synonyms: understudy |
| tabby | (noun) a cat with a grey or tawny coat mottled with black | Synonyms: tabby cat |
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| (noun) female cat | Synonyms: queen |
| tebibyte | (noun) a unit of information equal to 1024 gibibytes or 2^40 (1,099,511,627,776) bytes | Synonyms: TB, terabyte, TiB |
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| terabyte | (noun) a unit of information equal to 1024 gibibytes or 2^40 (1,099,511,627,776) bytes | Synonyms: TB, tebibyte, TiB |
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| (noun) a unit of information equal to 1000 gigabytes or 10^12 (1,000,000,000,000) bytes | Synonyms: TB |
| toby | (noun) a drinking mug in the shape of a stout man wearing a three-cornered hat | Synonyms: toby fillpot jug, toby jug |
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| trilby | (noun) a hat made of felt with a creased crown | Synonyms: fedora, felt hat, homburg, Stetson |
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| wallaby | (noun) any of various small or medium-sized kangaroos; often brightly colored | Synonyms: brush kangaroo |
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| yatobyo | (noun) a highly infectious disease of rodents (especially rabbits and squirrels) and sometimes transmitted to humans by ticks or flies or by handling infected animals | Synonyms: deer fly fever, rabbit fever, tularaemia, tularemia |
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| yobibyte | (noun) a unit of information equal to 1024 zebibytes or 2^80 bytes | Synonyms: YB, YiB, yottabyte |
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| yottabyte | (noun) a unit of information equal to 1024 zebibytes or 2^80 bytes | Synonyms: YB, YiB, yobibyte |
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| (noun) a unit of information equal to 1000 zettabytes or 10^24 bytes | Synonyms: YB |
| zebibyte | (noun) a unit of information equal to 1024 exbibytes or 2^70 bytes | Synonyms: ZB, zettabyte, ZiB |
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| zettabyte | (noun) a unit of information equal to 1024 exbibytes or 2^70 bytes | Synonyms: ZB, zebibyte, ZiB |
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| (noun) a unit of information equal to 1000 exabytes or 10^21 bytes | Synonyms: ZB |