| alula | (noun) tuft of small stiff feathers on the first digit of a bird's wing | Synonyms: bastard wing, spurious wing |
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| (noun) scalelike structure between the base of the wing and the halter of a two-winged fly | Synonyms: calypter |
| cellularity | (noun) the state of having cells | - |
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| hypercellularity | (noun) the state of having abnormally many cells | - |
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| hypocellularity | (noun) the state of having abnormally few cells | - |
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| pullulation | (noun) a rapid and abundant increase | - |
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| (noun) asexual reproduction in which a local growth on the surface or in the body of the parent becomes a separate individual | Synonyms: gemmation |
| ululation | (noun) a long loud emotional utterance | Synonyms: howl, howling |
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