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View synonyms for

joist

[ joist ]

noun

  1. any of a number of small, parallel beams of timber, steel, reinforced concrete, etc., for supporting floors, ceilings, or the like.

verb (used with object)

  1. to furnish with or fix on joists.

joist

/ ɔɪ /

noun

  1. a beam made of timber, steel, or reinforced concrete, used in the construction of floors, roofs, etc See also rolled-steel joist
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. tr to construct (a floor, roof, etc) with joists
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Other Word Forms

  • Ǿl adjective
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Word History and Origins

Origin of joist1

1325–75; Middle English giste < Old French < Latin *jacitum support, noun use of neuter of Latin jacitus (past participle of Ჹŧ to lie), equivalent to jaci- variant stem + -tus past participle suffix
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Word History and Origins

Origin of joist1

C14: from Old French giste beam supporting a bridge, from Vulgar Latin jacitum (unattested) support, from Ჹŧ to lie

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