" Anatomy . Designating a layer of dense white connective tissue, specifically the tunica albuginea of the testis, ovary, etc", Early 17th cent.; earliest use found in Helkiah Crooke (1576–1648), physician and anatomist. From post-classical Latin albugineus designating a humour (the aqueous humour) within the eye from classical Latin albūgin-, albūgō + -eus: see -eous) + -ous.[albugineous etymology, albugineous origin, 英语词源]