nonageni

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

nōnāgēni, ae, a (gen. pl. nonagenūm, Front. Aquaed. 61), adj. distr. [nonaginta],

ninety each : porticus ascenduntur nonagenis gradibus omnes, Plin. 36, 13, 19, § 88.