efflorescence

ef·flo·res·cence

noun \ˌef-lə-ˈres-^ən(t)s\

Definition of EFFLORESCENCE

1

: the process of efflorescing; also : the powder or crust so formed

2

: a redness of the skin or an eruption (as in a rash)

—ef·flo·res·cent \-^ənt\ adjective