- Also called , . an orchid, Arethusa bulbosa, of eastern North America, having a solitary pink flower with a blotched, fringed lip: now rare.
- (initial capital letter) Classical Mythology. a nymph who was changed into a spring to save her when she was being pursued by the river god Alpheus.
- a North American orchid, Arethusa bulbosa, having one long narrow leaf and one rose-purple flower fringed with yellow
- Greek myth a nymph who was changed into a spring on the island of Ortygia to escape the amorous advances of the river god Alpheus