Lens That Bends Inwards; Opposite of Convex
This page is the CodyCross answer for the clue below from Botanical Garden, Group 1436, Puzzle 2 (Nuts and Seeds).
Question is: Lens That Bends Inwards; Opposite of Convex
and the answer is: CONCAVE
Word Meaning:
CONCAVE — Curved like the inner surface of a sphere or bowl.
Definitions from Wiktionary.