Webster’s Revised Unabridged Dictionary · 1913
Coomb
Coomb (ko͞om), n. [AS. cumb a liquid measure, perh. from LL. cumba boat, tomb of stone, fr. Gr. κύμβη hollow of a vessel, cup, boat, but cf. G. kumpf bowl.] A dry measure of four bushels, or half a quarter. [Written also comb.]
Coomb, Coombe, n. [See Comb, Combe, in this sense.] A hollow in a hillside. [Prov. Eng.] See Comb, Combe.