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.
A callus is an abnormal thickening of the top layer of skin, which is composed of the natural protein, keratin. Calluses can form on areas that are repeatedly exposed to friction or pressure. They are usually painless or only mildly painful. A corn is a small, well-defined, thickened area of skin that forms on the toes.Corns put pressure on the underlying skin against the bone.They are usually inflamed and painful.alluses and corns form as protective pads of skin in response to repeated friction or pressure. Causes include: 1  CallusesâAny activity that applies repeated friction or pressure to an area of skin, including: 2  Lifting weights (hands). 3  Using tools (hands).