Like the Moon When It Isn't Crescent or Full

This page is the CodyCross answer for the clue below from Performing Arts, Group 881, Puzzle 4 (Monologues).

Question is: Like the Moon When It Isn't Crescent or Full

and the answer is: GIBBOUS

Word Meaning:

GIBBOUS — Curved or bulged outward.

Definitions from Wiktionary.