1 [mass noun]a pink powder consisting of zinc carbonate and ferric oxide, used to make a soothing lotion or ointment:
[as modifier]calamine lotion.
2 datedsmithsonite or a similar zinc ore.
– ORIGIN late Middle English: via Old French from medieval Latincalamina, alteration of Latincadmia‘calamine’, from Greekkadmeia (gē)‘Cadmean (earth)’, from Kadmos‘Cadmus’ (see Cadmus).