swanwort|ˈswɒnwɜːt| [f. swan n. + wort n.] †a. (Only OE.) Some unidentified (? aquatic) plant. b. A book-name for the genus Cycnoches: =swan-flower, swan-plant (a): see swan n. 4 b, swan-neck 3. c1000Sax.Leechd. II. 74 Wiþ deadum swile, ᵹenim swane wyrt.1866[see swan-neck 3].