half-moon

Từ điển Oxford Advanced Learner 8th

ˌhalf-ˈmoon [half-moon half-moons] BrE NAmE noun
1. the moon when only half of it can be seen from the earth; the time when this happens
compare ↑full moon, ↑harvest moon, ↑new moon
2. a thing that is shaped like a half-moon