C / cŏ-aequālis
adjective

cŏ-aequālis

neut. cŏ-aequāle
of equal age; coeval; a comrade by extension
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.