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casement window

 - 3 dictionary results

case⋅ment

[keys-muhnt]
–noun
1. a window sash opening on hinges that are generally attached to the upright side of its frame.
2. Also called casement window. a window with such a sash or sashes.
3. a casing or covering.

Origin:
1375–1425; late ME. See case 2 , -ment


case⋅ment⋅ed, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Word Origin & History

casement 
1430, probably aphetic of O.Fr. dial. enchassement "window frame," from en- "in," prefix forming verbs, + casse "case, frame" (see case (2)) + -ment. Or possibly from Anglo-L. cassementum, from casse. The Irish surname is originally Mc Casmonde (attested from 1429), from Mac Asmundr, from Ir. mac "son of" + O.N. Asmundr "god protector."
Online Etymology Dictionary, © 2001 Douglas Harper
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Encyclopedia

casement window

earliest form of movable window, wood or metal framed, with hinges or pivots at the upright side of the vertically hung sash, so that it opens outward or inward along its entire length in the manner of a door. One frame, separately movable, of such a window is called a casement sash.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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