What is "salient polygon"

Salient \Sa"li*ent\, a. [L. saliens, -entis, p. pr. of salire to leap; cf. F. saillant. See Sally, n. & v. i..]

1. Moving by leaps or springs; leaping; bounding; jumping. ``Frogs and salient animals.''
   --Sir T. Browne.

2. Shooting out or up; springing; projecting.

   He had in himself a salient, living spring of generous and manly action.
   --Burke.

3. Hence, figuratively, forcing itself on the attention; prominent; conspicuous; noticeable.

   He [Grenville] had neither salient traits, nor general comprehensiveness of mind.
   --Bancroft.

4. (Math. & Fort.) Projecting outwardly; as, a salient angle; -- opposed to re["e]ntering. See Illust. of Bastion.

5. (Her.) Represented in a leaping position; as, a lion salient.

   Salient angle. See Salient, a., 4.

   Salient polygon (Geom.), a polygon all of whose angles are salient.

   Salient polyhedron (Geom.), a polyhedron all of whose solid angles are salient.