LAT

Lewis Short

nōnāgēni, ae, a (
* Gen. pl. nonagenūm, Front. Aquaed. 61), adj. distr. [nonaginta], ninety each: porticus ascenduntur nonagenis gradibus omnes,Plin. 36, 13, 19, § 88.
Charlton T. Lewis, Charles Short, A Latin Dictionary
memory