"calypsos" in the noun sense
1. calypso, fairy-slipper, Calypso bulbosa
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
Greek mythology) the sea nymph who detained Odysseus for seven years
Source: WordNet® (An amazing lexical database of English)
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