cen·ti·me·tre centimetres in AM, use centimeter A centimetre is a unit of length in the metric system equal to ten millimetres or one-hundredth of a metre. a tiny fossil plant, only a few centimetres high. S3 centimeter cm a unit for measuring length. There are 100 centimetres in one metre
A unit of volume equal to that of a cube having sides each one centimetre in length, commonly used in fluid measure and for engine sizes. Symbols: cm3 and cc