marked as with needle scratches.
aciculate: a surface that appears as if scratched with a needle.
Explanation of Terms Used in Entomology John. B. Smith
marked with or as if with needle scratches
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
- Acid anhydride
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 […]
Chemistry. a compound usually having a sour taste and capable of neutralizing alkalis and reddening blue litmus paper, containing hydrogen that can be replaced by a metal or an electropositive group to form a salt, or containing an atom that can accept a pair of electrons from a base. Acids are proton donors that yield […]
- Acid cell
Electricity. a cell using an acid electrolyte. . acid cell n. See parietal cell.