ˈdestrēər, (ˈ)de|stri(ə)r noun
( -s )
Etymology: Middle English, from Old French, from destre right hand, from Latin dextera, dextra, from dexter right; from the fact that the knight's horse was led by the squire with his right hand — more at dexter
: a large powerful horse used as a war-horse by a medieval knight