Lewis Short
jūglans (noun F) : i. q. Jovis glans = Gr. Διὸς βάλανος
* A walnut; a walnut-tree: haec glans optima, et maxima, ab Jove et glande juglans appellata est,Varr. L. L. 5, § 102 Müll.: juglandium putamina,Cic. Tusc. 5, 20, 58: juglandium umbra,Plin. 17, 12, 18, § 89.—Also with nux: nuces juglandes,Plin. 15, 22, 24, § 86.
Charlton T. Lewis, Charles Short, A Latin Dictionary