denary

Etymology 1

From Middle English denarie, from the Latin dēnārius, used elliptically for dēnārius nummus (“denary coin, coin containing ten asses”). Compare etymology 2 below.

noun

1. An ancient coin, the denarius.

Etymology 2

First attested in 1577; from the Latin dēnārius (“containing ten”), from dēnī (“ten each, ten at a time”) + -ārius (whence the English suffix -ary).

adj

1. Containing ten parts.
2. Based on the number ten (as ternary is based on number 3)