| ala | (noun) a wing of an insect | - |
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| (noun) a flat wing-shaped process or winglike part of an organism | - |
| alabaster | (noun) a very light white | - |
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| (noun) a compact fine-textured, usually white gypsum used for carving | - |
| (noun) a hard compact kind of calcite | Synonyms: Mexican onyx, onyx marble, oriental alabaster |
| alacrity | (noun) liveliness and eagerness | Synonyms: briskness, smartness |
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| alalia | (noun) paralysis of the vocal cords resulting in an inability to speak | - |
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| alanine | (noun) a crystalline amino acid that occurs in many proteins | - |
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| alarm | (noun) a device that signals the occurrence of some undesirable event | Synonyms: alarm system, warning device |
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| (noun) a clock that wakes a sleeper at some preset time | Synonyms: alarm clock |
| (noun) an automatic signal (usually a sound) warning of danger | Synonyms: alarum, alert, warning signal |
| (noun) fear resulting from the awareness of danger | Synonyms: consternation, dismay |
| alarmism | (noun) needless warnings | - |
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| alarmist | (noun) a person who alarms others needlessly | - |
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| alarum | (noun) an automatic signal (usually a sound) warning of danger | Synonyms: alarm, alert, warning signal |
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| alastrim | (noun) a mild form of smallpox caused by a less virulent form of the virus | Synonyms: Cuban itch, Kaffir pox, milk pox, pseudosmallpox, pseudovariola, variola minor, West Indian smallpox, white pox |
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