pitot-tube

Pitot tube

[pee-toh, pee-toh]
noun
( often lowercase ) an instrument for measuring fluid velocity, consisting of a narrow tube, one end of which is open and faces upstream, the other end being connected to a manometer.

Origin:
1880–85; named after Henri Pitot (1695–1771), French physicist, who invented it

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World English Dictionary
Pitot tube (ˈpiːtəʊ) [Click for IPA pronunciation guide]
 
n
1.  a small tube placed in a fluid with its open end upstream and the other end connected to a manometer. It measures the total pressure of the fluid
2.  short for Pitot-static tube, esp one fitted to an aircraft
 
[C18: named after its inventor, Henri Pitot (1695--1771), French physicist]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Pitot-tube is always a great word to know.
So is lollapalooza. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a chattering or flighty, light-headed person.
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