blowhole


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blowhole

1. the nostril, paired or single, of whales, situated far back on the skull
2. a hole in ice through which whales, seals, etc., breathe
3. a bubble-like defect in an ingot resulting from gas being trapped during solidification
4. Geology a hole in a cliff top leading to a sea cave through which air is forced by the action of the sea

blowhole

[′blō‚hōl]
(geology)
A longitudinal tunnel opening in a sea cliff, on the upland side away from shore; columns of sea spray are thrown up through the opening, usually during storms.
(metallurgy)
A pocket of air or gas formed in a metal during solidification.
(vertebrate zoology)
The nostril on top of the head of cetacean mammals.

gas pocket, blowhole

A hole or void, as in a casting, which results from entrained air.
References in periodicals archive ?
Like all mammals, they breathe air, coming up to the Water's surface at regular intervals to lake a breath via the blowholes located on the top of their heads.
Encourage students to make the whale's eyes, mouth, tail, fins, flippers and blowhole.
She knew that his blowhole had to stay above water.
Blowhole in the hilariously action-packed The Penguins of Madagascar: Dr.
The liquid that came out of the animal's blowhole had traces of blood and phlegm.
They used a remotely controlled, six-rotor hexacopter to take detailed aerial photographs of the whales and to collect samples of their "blow"--the moist breath that a whale sprays out of its blowhole when it exhales.
The whales also carry diseases so people need to avoid contact with blowhole exhalent or body fluids.
They breathe through a blowhole or nostril on the top of their heads.
In an online incident report, Swanage Coastguard said: "Entry to the cave was either underwater, or though a narrow blowhole at the top of the cave.
The principal escort's defensive behaviors include visual displays, such as lunging through the water with ventral throat grooves expanded, making the whale look visually larger, to screens of bubbles expelled from the blowhole or mouth, to chases and physical strikes, sometimes drawing blood from a rival," Pack explained.
All the residents of the Dolphin Bay are Indo-Pacific Bottlenose dolphins, who breathe air out of a blowhole located on the top of their head.
We've documented several cases where a PWB produces blowholes on a Pb-free wave, but none on a SnPb wave, so copper erosion may play a part in blowhole formation as well.