The Collaborative International Dictionary of English v.0.48:

Fluorescent \Flu`o*res"cent\, a.
   Having the property of fluorescence.
   [1913 Webster]

WordNet (r) 3.0 (2006):

fluorescent
    adj 1: emitting light during exposure to radiation from an
           external source
    2: brilliantly colored and apparently giving off light;
       "fluorescent colors"
    n 1: a lighting fixture that uses a fluorescent lamp [syn:
         fluorescent, fluorescent fixture]