Anal style: a slender process on or within the terminal segment of the abdomen in Homoptera.
Anal tubercle: Collembola; the tubercle bearing the anal organs: = anal papilla.
Anal tubercles: a pair of prominent, rounded or conical processes, situate one on each side of the anus in certain Coccids.
Anal valves: see podical plates.
Anal veins: those longitudinal unbranched veins extending from base to outer margin below the cubitus; the first anal, also termed vena dividens, q.v., is the 6th of the series starting from the base, and it may be followed by several others which are numbered in order to the inner margin.
Anastomosing: inosculating or running into each other.
Anastomosis: a running together; usually applied to wing veins, often to markings; sometimes used like stigma, q.v.; also in Neuroptera, a series of cross-veinlets nearly in one row; a connecting series of veinlets.
Anceps: two-edged; similar to ensiform, q.v.
Ancestral: primitive; inherited from an earlier form or ancestor.
Anchor process: = breastbone, q.v.