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Definition of portcullis - 2 dictionary results

port⋅cul⋅lis

[pawrt-kuhl-is, pohrt-]
–noun
(esp. in medieval castles) a strong grating, as of iron, made to slide along vertical grooves at the sides of a gateway of a fortified place and let down to prevent passage.

Origin:
1300–50; ME portecolys < MF porte coleice, equiv. to porte port 4 + coleice, fem. of coleis flowing, sliding < VL *cōlātīcius; see coulee, -itious
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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port·cul·lis   (pôrt-kŭl'ĭs, pōrt-)   
n.  A grating of iron or wooden bars or slats, suspended in the gateway of a fortified place and lowered to block passage.

[Middle English port-colice, from Old French porte coleice, sliding gate : porte, gate (from Latin porta; see per-2 in Indo-European roots) + coleice, feminine of coleis, sliding (from Vulgar Latin *cōlātīcius, from Latin cōlātus, past participle of cōlāre, to filter, strain, from cōlum, sieve).]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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