Me·lis·sa n. Bot. A genus of labiate herbs, including the balm, or bee balm (Melissa officinalis).
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Melissa officinalis
n : bushy perennial Old World mint having small white or
yellowish flowers and fragrant lemon-flavored leaves; a
garden escapee in northern Europe and North America [syn:
lemon balm, garden balm, sweet balm, bee balm, beebalm]