immātūrĭtas (inm-), ātis, f. [immaturus].
I Unripeness , immatureness : sponsarum, Suet. Aug. 34.—*
II Untimely haste , over-eagerness : quid haec festinatio, quid haec immaturitas tanta significat? Cic. Quint. 26, 82.
immātūritās (inm-) ātis, f immaturus, untimely haste : tanta. ...
An Elementary Latin Dictionary