| alkyl | (noun) any of a series of univalent groups of the general formula CnH2n+1 derived from aliphatic hydrocarbons | Synonyms: alkyl group, alkyl radical |
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| alkylbenzene | (noun) organic compound that has an alkyl group bound to a benzene ring | - |
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| alkylbenzenesulfonate | (noun) sulfonate of alkyl benzene | - |
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| alkylic | (adjective) of or related to an alkyl | - |
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| ankyloglossia | (noun) a congenital anomaly in which the mucous membrane under the tongue is too short limiting the mobility of the tongue | Synonyms: tongue tie |
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| ankylosaur | (noun) having the back covered with thick bony plates; thought to have walked with a sprawling gait resembling a lizard's | Synonyms: ankylosaurus |
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| ankylosaurus | (noun) having the back covered with thick bony plates; thought to have walked with a sprawling gait resembling a lizard's | Synonyms: ankylosaur |
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| ankylose | (verb) undergo ankylosis | Synonyms: ancylose |
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| (verb) produce ankylosis by surgery | Synonyms: ancylose |
| ankylosis | (noun) abnormal adhesion and rigidity of the bones of a joint | Synonyms: anchylosis |
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| ankylotic | (adjective) relating to or characteristic of the abnormality ankylosis | - |
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| kylie | (noun) an Australian boomerang; one side flat and the other convex | Synonyms: kiley |
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| kylix | (noun) a shallow drinking cup with two handles; used in ancient Greece | Synonyms: cylix |
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| skylark | (noun) brown-speckled European lark noted for singing while hovering at a great height | Synonyms: Alauda arvensis |
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| (verb) play boisterously | Synonyms: cavort, disport, frisk, frolic, gambol, lark, lark about, rollick, romp, run around, sport |
| skylight | (noun) a window in a roof to admit daylight | Synonyms: fanlight |
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| skyline | (noun) the line at which the sky and Earth appear to meet | Synonyms: apparent horizon, horizon, sensible horizon, visible horizon |
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| (noun) the outline of objects seen against the sky | - |