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| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| the offspring of a zebra and a donkey. |
| gum up | |
| —vb | |
| 1. | to cover, dab, or stiffen with gum |
| 2. | informal to make a mess of; bungle (often in the phrase gum up the works) |
gum 2
n.
The firm connective tissue covered by mucous membrane that envelops the alveolar arches of the jaw and surrounds the bases of the teeth. Also called gingiva. v. gummed, gum·ming, gums
To chew food with toothless gums.
| gum 2 (gŭm) Pronunciation Key
See gingiva. |
gum up
Ruin or bungle something, as in The front office has gummed up the sales campaign thoroughly. This idiom is also put as gum up the works, as in John's changes in procedures have gummed up the works in the shipping department. [Slang; c. 1900]