"You canker blossom!" 3 Shakespearean Insults
1620s, from French efflorescence, from Latin efflorescentem (nominative efflorescens), present participle of efflorescere (see effloresce).
A whitish, powdery deposit on the surface of rocks or soil in dry regions. It is formed as mineral-rich water rises to the surface through capillary action and then evaporates. Efflorescence usually consists of gypsum, salt, or calcite.