doublehung

double-hung

[duhb-uhl-huhng]
adjective
1.
(of a window) having two vertically sliding sashes, each closing a different part of the opening.
2.
(of a window sash) sliding vertically, with a counterweight on each side.

Origin:
1815–25

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
double-hung
 
adj
(of a window) having two vertical sashes, the upper one sliding in grooves outside those of the lower

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