trideka

Esperanto

Esperanto numbers ^(edit)

		300
←  20	←  29	30	31  →	40  →
		3
Cardinal: tridek     Ordinal: trideka

Etymology

From tridek +‎ -a.

Adjective

trideka (accusative singular tridekan, plural tridekaj, accusative plural tridekajn)

1. (ordinal number) thirtieth