a combining form with the meanings âheight,â âtip end,â âextremities of the body,â used in the formation of compound words: acrophobia. Also, especially before a vowel, acr-. Origin of acro-. < Greek, combining form of Ã¡kros topmost, highest; akin to Latin Äcer sharp.
â¢ CANTUS FIRMUS (noun) The noun CANTUS FIRMUS has 1 sense: 1. a melody used as the basis for a polyphonic composition. Familiarity information: CANTUS FIRMUS used as a noun is very rare. Dictionary entry details.
metatarsus varus, a congenital deformity of the foot in which the forepart rotates inward toward the midline of the body and the heel remains straight.Also called intoe, metatarsus adductus, pigeon-toed, toeing in.etatarsus varus. 1. A forefoot deformity in which the medial foot is lifted upward and outward, such that the victim is walking on the outer edge of the foot. 2.