The Collaborative International Dictionary of English v.0.48:
Efflorescent \Ef`flo*res"cent\, a. [F. efflorescent, L. efflorescens, -entis, blooming, p. pr. of efflorescere. See Effloresce, v. i.] 1. That effloresces, or is liable to effloresce on exposure; as, an efflorescent salt. [1913 Webster] 2. Covered with an efflorescence. [1913 Webster]WordNet (r) 3.0 (2006):
efflorescent adj 1: bursting into flower; "flowering spring trees" [syn: abloom, efflorescent]