Emily Dickinson Lexicon

CUD, n. [As this word is often vulgarly pronounced quid, I suspect it to be a corruption of the D. kaauwd, gekaauwd, chewed, from kaauwen, to chew, Arm. chaguein, Sax. ceowan. See Chew and Jaw.]

1. The food which ruminating animals chew at leisure, when not grazing or eating; or that portion of it which is brought from the first stomach and chewed at once.
2. A portion of tobacco held in the mouth and chewed.
3. The inside of the mouth or throat of a beast that chews the cud. – Encyc.