Definition of gloup
: an opening in the roof of a sea cave through which incoming waves may force air to rush upward or water to spout intermittently : blowhole 3
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Origin and Etymology of gloup
probably of Scandinavian origin; akin to Norwegian dialect glūp hole, gorge, abyss; akin to Swedish dialect glūpa to gape, swallow, Old Frisian glūpa to look, Middle Low German glūpen to look with half-closed eyes, and perhaps to Old English geolu yellow — more at yellow
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