- C.M.
- Rom. Cath. Ch.Congregation of the Mission.
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cm. or cm (no period),centimeter or centimeters.c.m.,an abbreviation for the following:1. church missionary.2. circular mill.3. corresponding member.4. countermarked.Cm (no period),curium (chemical element).CM (no periods),1. command module.2. Common Market.3. court-martial.
Useful english dictionary. 2012.