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.
Concave = hollowed or rounded inward. Convex = curved or rounded outward. If the moving joint surface is CONVEX, sliding is in the OPPOSITE direction of the angular movement of the bone. If the moving joint surface is CONCAVE, sliding is in the SAME direction as the angular movement of the bone.