trigesimal

adj, noun — 3 senses

trigesimal

adj

Etymology From Latin trigesimus (“thirtieth”) + -al (“forming adjectives”).

1

Obsolete Thirtieth.

In the trigesimal year of his reign...

2

Rare Containing thirty of something.

Each month is a roughly trigesimal period.

trigesimal

noun

Etymology From Latin trigesimus (“thirtieth”) + -al (“forming adjectives”).

1

The trigesimal number system; base 30.

Derived terms: duotrigesimal

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.