WordNet (r) 3.0 (2006):

Prozac
    n 1: a selective-serotonin reuptake inhibitor commonly
         prescribed as an antidepressant (trade names Prozac or
         Sarafem); it is thought to work by increasing the activity
         of serotonin in the brain [syn: fluoxetine, fluoxetine
         hydrocholoride, Prozac, Sarafem]