Lewis & Short

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

lapsăna (lampsăna), ae, f. (also lapsănium, ii, n., Hier. ap. Reg. S. Pachom. 52), = λαψάνη and λαμψάνη, an edible plant, charlock, Sinapis arvensis, Linn.; Plin. 20, 9, 37, § 96; Varr. R. R. 3, 16, 25; Cels. 2, 25.
Prov.: lapsanā vivere, to live on a meagre diet, Plin. 19, 8, 41, § 144.