expirator
(ˈɛkspɪreɪtə(r))
[agent-n. f. L. ex(s)pīrāre to expire.]
An instrument for forcing out air.
| 1875 Ure Dict. Arts s.v. Aspirator, The following form of spirator..may be employed either as aspirator in drawing, or as expirator in forcing air through an apparatus. |