1. 1. The act of exercising; a setting in action or practicing; employment in the proper mode of activity; exertion; application; use; habitual activity;...

2. Characterized by heterology; consisting of different elements, or of like elements in different proportions; different; -- opposed to homologous; as, ...

3. 1. The stripping or falling off of plumes or feathers. Bp. Stillingfleet 2. (Med.) A disease of the eyelids, attended with loss of the eyelashes. Tho...

4. 1. An exceptor. [R.] 2. (Med.) An inert or slightly active substance used in preparing remedies as a vehicle or medium of administration for the medi...