'Destrer' definitions:

Definition of 'Destrer'

From: GCIDE

Destrer \Des*trer"\, Dextrer \Dex"trer\, n. [OF. destrier, fr. L. dextra on the right side. The squire led his master's horse beside him, on his right hand. Skeat.] A war horse. [Obs.] --Chaucer. [1913 Webster]