1. (n.) The act of depriving of virility, or the state of being so deprived; castration.

2. (n.) The act of depriving, or state of being deprived, of vigor or strength; unmanly weakness.

Houyhnhnm altering blank cartridge brood mare castration castrato charger colt courser critter dobbin dud emasculation entire entire horse equine eunuch filly fixing foal horse impotent incompetent invalid mare mount nag prancer spaying stallion steed stud studhorse tarpan top horse war-horse weakling wild horse