Cumulus

Chamber's Etymological of the English Language · 1895 · p. 118
ku'mu-lus, n. a species of cloud. Cuneal, ku'ne-al, Cuneate, kfi'ne-at, adj. of the form of a wedge. [X. cuneus, a wedge Cuneiform, ku-ne'i-form, Cunifonn, ku'ni-form, adj. wedge-shaped—specially applied to the old Babylonian and A yrian writing, of which the characters have a wedge-shape.
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