| 1. | Also called dragon's mouth, swamp pink. an orchid, Arethusa bulbosa, of eastern North America, having a solitary pink flower with a blotched, fringed lip: now rare. |
| 2. | (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. |

ar·e·thu·sa (är'ə-thōō'zə, -sə) n. See swamp pink. [From Arethusa.] |
| swamp pink n. An orchid (Arethusa bulbosa) of northeast North America having a solitary, usually rose-colored flower with a purple-spotted, yellow-crested lip. Also called arethusa, dragon's mouth. |
Arethusa
in Greek mythology, a nymph who gave her name to a spring in Elis and to another on the island of Ortygia, near Syracuse
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