BLOWHOLE

n. vent for the escape of gas or air; spiracle of a whale or another cetacean located far back on the head; hole in the ice to which animals (such as whales, seals, etc.) come to breathe

Blowhole may refer to:Blowhole (biology), the hole at the top of a whale or other cetacean's head, homologous with a nostrilBlowhole (geology), a hole at the inland end of a sea cave through which waves funnel up and outBlowhole, a slang term used in and around Cork, Ireland to describe a braggart or one who greatly exaggerates their experiences or achievements.
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Noun
1. the spiracle of a cetacean located far back on the skull
(hypernym) spiracle
(part-holonym) cetacean, cetacean mammal, blower
2. a hole for the escape of gas or air
(synonym) vent, venthole, vent-hole
(hypernym) hole
(hyponym) smoke hole
(part-holonym) air passage, air duct, airway

(n.)
An air hole in a casting.
  

(n.)
A nostril or spiracle in the top of the head of a whale or other cetacean.
  

(n.)
A hole in the ice to which whales, seals, etc., come to breathe.
  

(n.)
A cavern in a cliff, at the water level, opening to the air at its farther extremity, so that the waters rush in with each surge and rise in a lofty jet from the extremity.
  

Synonyms and related words:
air duct, air hole, air passage, air shaft, air tube, airway, armhole, avenue, breathing hole, bullet-hole, bunghole, channel, chute, cringle, deadeye, debouch, door, egress, emunctory, escape, estuary, exhaust, exit, eye, eyelet, floodgate, flume, gasket, grommet, guide, keyhole, knothole, loop, loophole, louver, louverwork, manhole, mousehole, naris, nostril, opening, out, outcome, outfall, outgate, outgo, outlet, peephole, pigeonhole, pinhole, placket, placket hole, pore, port, porthole, punch-hole, sally port, shaft, sluice, spilehole, spiracle, spout, tap, touchhole, transom, vent, ventage, venthole, ventiduct, ventilating shaft, ventilator, vomitory, way out, weir, wind tunnel