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]

U.S. Gazetteer Places (2000):

Melissa, TX -- U.S. city in Texas
   Population (2000):    1350
   Housing Units (2000): 501
   Land area (2000):     4.585624 sq. miles (11.876710 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    4.585624 sq. miles (11.876710 sq. km)
   FIPS code:            47496
   Located within:       Texas (TX), FIPS 48
   Location:             33.283534 N, 96.571851 W
   ZIP Codes (1990):     75454
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Melissa, TX
    Melissa