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portcullis (n.)
also port-cullis, c. 1300, port-colice, "strong grating of wood or iron made to fit in the entrance of a fortified place," from Old French porte coleice "sliding gate" (c. 1200, Modern French porte à coulisse), from porte "gate" (from Latin porta, from PIE root *per- (2) "to lead, pass over") + coleice "sliding, flowing," fem. of coleis, from Latin colatus, past participle of colare "to filter, strain," which is of uncertain origin.
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Definitions of portcullis from WordNet
Dictionary entries near portcullis
port
Port Royal
portable
portage
portal
portcullis
Porte
porte-cochere
portend
portent
portentous