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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 blow·hole /-ˌhol/

From: Webster's Revised Unabridged Dictionary (1913)

 Blow·hole n.
 1. 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.
 2. A nostril or spiracle in the top of the head of a whale or other cetacean.
 Note:There are two spiracles or blowholes in the common whales, but only one in sperm whales, porpoises, etc.
 3. A hole in the ice to which whales, seals, etc., come to breathe.
 4. Founding An air hole in a casting.

From: WordNet (r) 2.0

      n 1: the spiracle of a cetacean located far back on the skull
      2: a hole for the escape of gas or air [syn: vent, venthole,