Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
samera (samara, Plin. 16, 17, 29, § 72; 17, 11, 15, § 76), ae, f., the seed of the elm, Col. 5, 6, 2; 5, 6, 6; 7, 6, 7; 9, 13, 2.