Lewis Short
(adjective) : sĕnīlis, e, senex
* Of or belonging to old people, aged, senile (freq. and class.): Tages puerili specie dicitur visus, sed senili fuisse prudentiā,Cic. Div. 2, 23, 50; cf. partes (opp. viriles),Hor. A. P. 176: senile aliquid (opp. adulescentis aliquid),Cic. Sen. 11, 38: corpus,id. Sest. 22, 50: artus,Ov. M. 7, 250: vultus,id. ib. 8, 528: genae,id. ib. 8, 210: guttur,Hor. Epod. 3, 2: ruga,Ov. F. 5, 58: statua incurva,of an old man,Cic. Verr. 2, 2, 35, § 87: anni,Ov. M. 7, 163; 13, 66; and poet.: hiems (as the last, latest season of the year), id. ib. 15, 212: animus,Liv. 10, 22: stultitia,Cic. Sen. 11, 36: auctoritas morum,Quint. 11, 1, 32: artes,Tac. A. 3, 8: adoptio,id. ib. 1, 7 fin.: senile illud facinus,that wicked old woman,App. M. 4, p. 148, 9.—* Adv.: sĕnīlĭter, after the manner of an old person: tremere,Quint. 1, 11, 1.
Charlton T. Lewis, Charles Short, A Latin Dictionary