Glossary of Medical Terms

Our online medical glossary of medical terms and definitions includes definitions for terms related to treatment, and general medicine

PISTON

A sliding piece which either is moved by, or moves against, fluid pressure. It generally consists of a short cylinder fitting within a cylindrical vessel along which it moves, back and forth. It is used in steam engines to receive motion from the steam, and in pumps to transmit motion to a fluid; also for another purposes. Piston head, a slide valve, consisting of a piston, or connected pistons, working in a cylindrical case which is provided with ports that are traversed by the valve. Origin: F. Piston; cf. It. Pistone piston, also pestone a big pestle; all fr. L. Pinsere, pistum, to pound, to stamp. See Pestle, Pistil. Source: Websters Vocabulary
pectineal ligament   pectineal line   pectineal line of pubis   pectineal muscle   pectinesterase   pectineus   pectinibranch   pectinibranchiata   (1)
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