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 ?
A blowhole is a vertical fault in a cliff that has widened after exposure to strong waves - creating water pressure that can shoot up through the hole.
Fearnbach called positioning directions at a rapid pace that would rival that of a veteran auctioneer, and Durban piloted the hexacopter several feet above the blowhole. Some of the blow landed on a sterilized petri dish on top of the drone.
Blowholes are dependent on weather: air temperature and pressure interact to create the stunning effects when air travels from higher to lower density.
Unlike other baleen whales, the two blowholes on right whales are widely separated, causing their spouts to be seen as two distinct sprays.
They breathe air through blowholes that lead to their lungs (unlike fish that breathe using gills).
As a result whales now use blowholes starfish still hide in sandy rock pools and koalas have strong arms and flattened faces.
3.5 feet long is the size of a remote-controlled helicopter used to collect snot from whales' blowholes. The mucus samples will help scientists learn about bacteria living inside the animals.
Blowholes. Blowholing issues are often due to pinholes or other irregularities in the PTH plating, and can be very difficult to address.
All types of discontinuities in the walls of the casts, including the blowholes, conduct to the diminishing of the mechanical properties.
The whales also have an unusual hunting technique where they make "nets" of bubbles with the air they expel from their blowholes. First the whales make a deep dive and then they swim to the surface in a spiral pattern while they release a steady stream of bubbles.
Numerous parties report significant increases in blowholes. These increases vary from a few percentage points to double-digit hikes.
While we don't have blowholes, we do share a number of traits with humpback whales: we are warm blooded, breathe air, give birth to and nurse' live young.