any shape resembling the curved shape of the moon in its first or last quarters
source: WordNet 3.0
The increasing moon; the moon in her first quarter, or when defined by a concave and a convex edge; also, applied improperly to the old or decreasing moon in a like state.
source: Webster 1913
adjective satellite
resembling the new moon in shape
source: WordNet 3.0
verb
To form into a crescent, or something resembling a crescent.
