- atrichosy
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n. [Gr. a, without; trichos, hair]The absence of setae due to evolutionary regession.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.