air hole

1. A hole to admit or discharge air; specifically, a spot in the ice not frozen over. Source: opted

2. A fault in a casting, produced by a bubble of air; a blowhole. Source: opted

3. n. a local region of low pressure or descending air that causes a plane to lose height suddenly Source: wordnet

4. n. a hole that allows the passage of air Source: wordnet

5. 1. A hole to admit or discharge air; specifically, a spot in the ice not frozen over. 2. (Founding) A fault in a casting, produced by a bubble of air; a blowhole. Source: webster

6. A fault in a casting, produced by a bubble of air; a blowhole. Source: adambom

7. A hole to admit or discharge air; specifically, a spot in the ice not frozen over. A fault in a casting, produced by a bubble of air; a blowhole. Source: ecdict

Thesaurus links