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| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| a gadget; dingus; thingumbob. |
A word formed by combining the beginning letters of a name or phrase, as in WASP for white Anglo-Saxon Protestant, or by combining the initial syllables of a series of words, as in radar, which stands for radio detecting and ranging.
Note: Acronyms are often less clumsy than the complete expressions they represent and are easier to write and remember.