The Collaborative International Dictionary
Effloresce \Ef`flo*resce"\, v. i. [imp. & p. p. Effloresced; p. pr. & vb. n. Efflorescing.] [L. efflorescere to bloom, blossom; ex + florescere to begin to blossom, incho., fr. florere to blossom, fr. flos a flower. See Flower.]
To blossom forth.
--Carlyle.(Chem.) To change on the surface, or throughout, to a whitish, mealy, or crystalline powder, from a gradual decomposition, esp. from the loss of water, on simple exposure to the air; as, Glauber's salts, and many others, effloresce.
To become covered with a whitish crust or light crystallization, from a slow chemical change between some of the ingredients of the matter covered and an acid proceeding commonly from an external source; as, the walls of limestone caverns sometimes effloresce with nitrate of calcium in consequence of the action of nitric acid formed in the atmosphere.
Wiktionary
vb. (present participle of effloresce English)
Usage examples of "efflorescing".
Still, Kaijikan did not hesitate, but guided them unerringly across rock strewn ground bearded with pale and efflorescing mushrooms.