Lewis Short
bīmātus (noun M) : bimus
* The age of two years (of animals and plants): ante bimatum,Varr. R. R. 2, 5, 17; Col. 7, 3, 6; 7, 4, 4: (polypi) ultra bimatum non vivunt,Plin. 9, 30, 48, § 89; 11, 21, 24, § 73: neque his bimatu longior vita,id. 9, 30, 48, § 93.—Of children, Vulg. Matt. 2; 16.
Charlton T. Lewis, Charles Short, A Latin Dictionary