/ Dictionary / Index A arethusa: Meaning and Definition of Find definitions for: ar•e•thu•sa Pronunciation: (ar"u-th'zu), [key] — n. Also calledan orchid, Arethusa bulbosa, of eastern North America, having a solitary pink flower with a blotched, fringed lip: now rare. (cap.)a nymph who was changed into a spring to save her when she was being pursued by the river god Alpheus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: arethusa (Thesaurus) arete Aretino Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language