noun

centimeter

centimetre

The ruler is 30 centimeters long.

The ruler is 30 centimetres long.

A centimeter is a unit of length.

A centimetre is a unit of length.

((number)) centimetres (unit of length) The ruler is 30 centimetres long.

Synonyms: none; Antonyms: none

From French centimètre, from centi- ('hundredth') + mètre ('metre').

Think 'centi-' like 'century' (100 years) or 'percent' (per 100). A centimetre is 1/100th of a metre.

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