octōgēni — Lewis & Short
octōgēni, ae, a (
I gen. plur. octogenūm, Front. Aquaed. 58), num. distr. adj. [octo], eighty each:
data ex praedā militibus aeris octogeni bini,Liv. 10, 30.—
II In gen., eighty:
fetus,Plin. 9, 51, 75, § 165.