A horse or rider that moves at a canter, which is a moderate, three-beat gallop between a trot and a gallop.
From canter (a horse's gait), derived from 'Canterbury' in reference to the smooth pace pilgrims rode to Canterbury. One who canters is a canterer.
Canterbury pilgrims were so famous for their smooth, middle-speed rides that their gait became a verb—Chaucer's pilgrims literally gave their name to a horse movement!
Complete word intelligence in one call. Free tier — 50 lookups/day.