Lewis Short
lĭgustrum (noun N) :
* A plant, privet: alba ligustra cadunt,Verg. E. 2, 18: candidior folio nivei, Galatea, ligustri,Ov. M. 13, 789: loto candidior puella cygno, argento, nive, lilio, ligustro,Mart. 1, 116, 3.
* A plant, otherwise unknown, which, acc. to Pliny, was held by some to be the cyprus, Plin. 12, 24, 55, § 109; 24, 10, 45, § 74; 16, 18, 31, § 77.—To this perhaps may be referred ligustrum nigrum, Col. 10, 300.
Charlton T. Lewis, Charles Short, A Latin Dictionary