achaetousadj.
/eɪˈkiːtəs/, U.S. /eɪˈkidəs/ Zoology.
Having no bristles; not bearing chaetae.
ΘΚΠ
the world > animals > animal body > general parts > [adjective] > slender or pointed > filamentary > having hair-like part > having no bristle-like appendages
achaetous1884
the world > animals > animal body > general parts > covering or skin > [adjective] > having a coat > hairy, furry, or woolly > having bristles or bristly > having no bristles
achaetous1884
1884 A. Sedgwick & F. G. Heathcote tr. C. Claus Elem. Text-bk. Zool.: Protozoa to Insecta ix. 375 The segmentation of this achætous [Ger. borstenlosen] and externally unsegmented worm is entirely confined to the internal organisation.
1896 W. B. Benham in Cambr. Nat. Hist. II. 263 The peristomium is achaetous in the adult.
1952 Biol. Bull. 102 238 It is suggested that this region between the mouth and the first chaetigerous segment represents the first true segment, which in Ophelia bicornis is achaetous but distinct.
2005 Molecular Phylogenetics & Evol. 34 673/2 Arenicola and Abarenicola..are large worms which possess a long achaetous tail.
This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021).
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adj.1884