poppet valve

poppet

[pop-it]
noun
1.
Also called poppet valve. Machinery. a rising and falling valve consisting of a disk at the end of a vertically set stem, used in internal-combustion and steam engines.
2.
British Dialect. a term of endearment for a girl or child.
3.
Nautical. any of the vertical timbers bracing the bow or stern of a vessel about to be launched.

Origin:
1300–50; Middle English; earlier form of puppet

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World English Dictionary
poppet (ˈpɒpɪt)
 
n
1.  a term of affection for a small child or sweetheart
2.  Also called: poppet valve a mushroom-shaped valve that is lifted from its seating against a spring by applying an axial force to its stem: commonly used as an exhaust or inlet valve in an internal-combustion engine
3.  nautical a temporary supporting brace for a vessel hauled on land or in a dry dock
 
[C14: early variant of puppet]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

poppet
"small human figure used in witchcraft and sorcery," c.1300, early form of puppet (q.v.). Meaning "small or dainty person" is recorded from late 14c.; later a term of endearment.
Online Etymology Dictionary, © 2010 Douglas Harper
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