decimetre

n. (British spelling variant for decimeter) unit of length equaling one tenth of a meter

A decimetre (American spelling: decimeter, symbol dm) is a unit of length in the metric system, equal to one tenth of a metre, the current SI base unit of length. It can be written in scientific notations as 100×10-3 m (engineering notation) or (exponential notation) — meaning or respectively. The c is pronounced as /s/, unlike in decametre.
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Noun
1. a metric unit of length equal to one tenth of a meter
(synonym) decimeter, dm
(hypernym) metric linear unit
(part-holonym) meter, metre, m
(part-meronym) centimeter, centimetre, cm

n. decimetre, decimeter

(n.)
A measure of length in the metric system; one tenth of a meter, equal to 3.937 inches.