Lewis Short
(adjective) : semper-vīvus, a, um
* Ever-living: res (Spiritus sanctus),Prud. Ham. 164: herba, the plant called also aizoon, evergreen, houseleek, App. Herb. 123.—Also, subst.: sempervīva, ae,f., Pall. 1, 35, 3. —And in analogy with aizoon (Gr. ἀείζωον), sempervīvum, i, n., Plin. 25, 13, 102, § 160 (not in Jahn).
Charlton T. Lewis, Charles Short, A Latin Dictionary