Concavo-convex: hollowed out or concave on one surface, rounded or convex on the other; like a small segment of a hollow sphere.
Concentrated: gathered together at one point; intensified or strengthened by evaporation.
Conchate: applied to the shell-like inflation of the auricle in the cephalic tibia of Orthoptera.
Concinne: neat; fine.
Concolorous: of the same general color.
Concretion: a massing together of parts or particles.
Concurrent: applied to a vein which arises separately, runs into another and does-not again separate.
Conduplicate: doubled or folded together.
Condyle: a process which articulates the base of the mandible to the head: in general any process by means of which an appendage is articulated into a pan or cavity.
Confertim: closely clustered or crowded.