1. (Zoology) either of a pair of sensory appendages that arise from the mouthparts of crustaceans and insects. 2. (Zoology) either of a pair of tactile organs arising from the head or anterior end of certain annelids and molluscs. [C19: from French, from Latin palpus a touching]
Convex, meaning curving out or extending outward (compare concave), may refer to: Convex set in mathematics Convex function in mathematics convex polygon a polygon in which no line segment between two points on the boundary ever goes outside the polygon.
A lens that is concave on one side and convex on the other. 2. The curved upper surface of a column of liquid. The surface is concave if the molecules of the liquid are attracted to the container walls and convex if they are not. 3. A piece of cartilage shaped like a crescent and located at the junction of two bones in a joint, such as the knee.