Lewis Short
(adj.adv.) : fertĭlis, e, adj.fero, I. B. 3..
* Fruitful, fertile (class.; syn.: ferax, fecundus, uber).
* Lit.
* That makes fruitful or fertile, fertilizing (poet. and in post-Aug. prose): dea (i. e. Ceres), Ov. M. 5, 642: Nilus,Tib. 1, 7, 22; Val. Fl. 7, 608: majores fertilissimum in agro oculum domini esse dixerunt,Plin. 18, 6, 8, § 43.—Hence, * adv.: fertĭlĭter, fruitfully, abundantly: derelicta (metalla) fertilius revivescunt,Plin. 34, 17, 49, § 164.
* Trop., fertile, productive (poet. and in post-Aug. prose): fertile pectus habes,Ov. Pont. 4, 2, 11: Bacche, soles Phoebo fertilis esse tuo,Prop. 4 (5), 6, 76. tanto priscorum cura fertilior fuit,Plin. H. N. 14 praef. § 3.
* With abl.: ager a litore arboribus fertilis, intus frugibus tantum,Plin. 5, 5, 5, § 33: flumen auro,id. 6, 23, 26, § 98.
* With ad: tractus fertilis ad omnia,Plin. 2, 78, 80, § 190.—(ε) With a and abl.: Aetna a sacro numquam non fertilis igni,Lucil. Aetna, 556.
Charlton T. Lewis, Charles Short, A Latin Dictionary