Pulse
Smith's Dictionary
(seeds) usually means peas, beans and the seeds that grow in pods. In the Authorized Version it occurs only in (Lamentations 1:12,16) as the translation of words the literal meaning of which is “seeds” of any kind. Probably the term denotes uncooked grain of any kind, as barley wheat, millet, vetches, etc.
International Standard Bible Encyclopedia
puls (zero'-im (Da 1:12 margin, "herbs"), zere'onim (Da 1:16); compare zerua`, "sowing seed" (Le 11:37), and zeru'im, "things sown" (Isa 61:11)):
(1) In Da 1:12,16, it must mean herbs or vegetables grown from seeds; a vegetable diet is what is implied.
(2) In 2Sa 17:28, "pulse" after "parched" is not in the original, but is probably more correct than the translation in (1), as "pulse" usually implies leguminous plants, peas, beans, etc.