Aciculate: a surface that appears as if scratched with a needle.
Acidotheca: the pupal sheath of the ovipositor.
Acini: granulations, like those on a blackberry: the terminal secreting tubes of glands.
Acinose -ous: a surface set with acini.
Acone: applied to compound eyes in which the individual ocelli have no crystalline cone or lens; see eucone. {Scanner's note: this is no longer a valid usage for the word "ocelli". Currently the term is. See "ocellus" and "ommatidium".}
Acoustic nerve: connects the auditory pits or other organs of hearing with special ganglia.
Acridophagus: preying and feeding on grasshoppers.
Acrostichal bristles: Diptera; two rows of bristles on the middle of the dorsum; specifically, minute peculiar bristles on the dorso-central region of Dolichopodidae.
Aculeata: Hymenoptera; the stingers, including bees and wasps.
Aculeate: prickly; armed with short, sharp spines; specifically, in Hymenoptera furnished with a sting which is a modified ovipositor and connected with a poison sac.