DECA-

combining form

or dec- or deka- or dek-

Etymology: Middle English, from Latin, from Greek deka-, dek-, from deka ten — more at ten

1. : ten

deca gon

2.

[French déca-, déc-, from Latin deca-, dec- ]

: ten times (a specified unit of measure)

deca liter

dec are

— used in terms belonging to the metric system