Found 2 items, similar to air pump.
English → English (WordNet) Definition: air pump air pump n : a pump that moves air in or out of something [syn: vacuum pump ]
English → English (gcide) Definition: Air pump Air pump \Air" pump`\ 1. (Physics) A kind of pump for exhausting air from a vessel or closed space; also, a pump to condense air or force it into a closed space. [1913 Webster] 2. (Steam Engines) A pump used to exhaust from a condenser the condensed steam, the water used for condensing, and any commingled air. [1913 Webster]