Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
cŏlumbīnus, a, um [columba], pertaining to a dove or pigeon, dove-: pulli, Varr. R. R. 3, 7, 9; * Cic. Fam. 9, 18, 3; so also absol.: cŏlumbīni, ōrum, m., little doves, Mart. 13, 66: ovum, * Hor. S. 2, 4, 56: fimus, Plin. 17, 27, 47, § 259: stercora, id. 35, 6, 27, § 46.