Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
bīmātus, ūs, 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.