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.
POSSE COMITATUS. These Latin words signify the power of the county. 2. The sheriff has authority by the common law, while acting under the authority of the writ of the United States, commonwealth or people, as the case may be, and for the purpose of preserving the public peace, to call to his aid the posse comitatus.