Meaning

noun any shape resembling the curved shape of the moon in its first or last quarters

adjective resembling the new moon in shape

originFrom Middle English cressaunt, from Anglo-Norman cressaunt and Old French creissant (“crescent of the moon”) (French croissant), from Latin crēscēns, present active participle of crēscō (“arise, thrive”), from Proto-Indo-European *ḱreh₁- (“to grow”). See Old Armenian սերիմ (serim, “be born”) and սերեմ (serem, “bring forth”), Ancient Greek κόρη (kórē, “girl”) and κούρος (koúros, “boy”), Latin…

Etymology from Wiktionary, CC BY-SA 3.0