Aciculum
an .
Zoology. one of the slender, sharp stylets embedded in the parapodia of certain annelid worms, as the polychaetes.
noun (pl) -lums, -la (-lə)
a needle-like bristle that provides internal support for the appendages (chaetae) of some polychaete worms
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See under (def 1). a compound formed by removing water from a more complex compound: an oxide of a nonmetal (acid anhydride) or a metal (basic anhydride) that forms an acid or a base, respectively, when united with water. a compound from which water has been abstracted. Historical Examples Like most of the oxides of […]
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