The Collaborative International Dictionary of English v.0.48:
Melissa \Me*lis"sa\, n. [NL., fr. Gr. me`lissa a bee, honey.] (Bot.) A genus of labiate herbs, including the balm, or bee balm (Melissa officinalis). [1913 Webster]WordNet (r) 3.0 (2006):
Melissa n 1: a genus of Old World mints of the family Labiatae [syn: Melissa, genus Melissa]