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