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.
More About Convex Lens. 1  A convex lens is supposed to be made up of number of prisms with the base of each prism towards the centre of the lens. 2  When rays parallel to the principal axis pass through a convex lens, they are bent inwards.  The point at which they converge is known as principle focus.