\Cor*rade"\ (k?r-r?d"), v. t. [L. corradere, -rasum;
cor- + radere to rub.]
1. To gnaw into; to wear away; to fret; to consume. [Obs.]
   --Dr. R. Clerke.

2. (Geol.) To erode, as the bed of a stream. See {Corrosion}.