Lewis Short
(adj.Subst.) : cŏ-aequālis, e, adj.
* Of equal age, coeval (post-Aug.): sinciput,Petr. 136, 1.— Subst., a comrade, companion in age, Just. 23, 4, 9; Inscr. Orell. 4407 al.—Transf., of geese, Col. 8, 14, 8.
Charlton T. Lewis, Charles Short, A Latin Dictionary