Meaning

noun rare north temperate bog orchid bearing a solitary white to pink flower marked with purple at the tip of an erect reddish stalk above 1 basal leaf

noun (Greek mythology) the sea nymph who detained Odysseus for seven years

originOriginally Trinidad English, an alteration of kaiso, perhaps ultimately of African origin; Allsopp 1996 suggests Ibibio ka iso (“come on”), used to urge dancers on. The spelling reflects a later folk-etymological assimilation with the mythological name Calypso.

Etymology from Wiktionary, CC BY-SA 3.0