air hole
/ˈɛː həʊl/noun
1A hole or passage to admit air; especially a hole in a layer of ice formed over deep water, providing a breathing-place for aquatic animals or divers.
2 Metallurgy. A cavity in a metal casting, produced by the escape of air through the liquid metal. Now rare.
Origin
Early 17th century; earliest use found in Contract. From air + hole.
- fair-walling
- fairwards
- fairwater
- fairway
- fair-weather
- fair-weathered
- fair-weather friend
- fairy
- fairy armadillo
- fairy arrow
- fairy basslet
- fairy beads
- fairy bell
- fairy bells
- fairy bird
- fairy bluebird
- fairy book
- fairy bread
- fairy butter
- fairy cake
- fairy cap
- fairy cheeses
- fairy chess
- fairy court
- fairy cups