Pu

n. radioactive element (Chemistry)

PU can mean:PolyurethanePu - the chemical sign for PlutoniumPU Guinea-Bissau's (NATO country code)PU, the IATA airline designator for PLUNAmainframe processor units (PUs), see IBM mainframe.''PU rifle scope - One of the most popular sniper scopes"PU", a spelling of the sound "peeyoo!", a common verbal response to the smell of something unpleasant. See P.U. for its use in cartoon movies."PU", a shortcut for the Dutch gamesmagazine Power Unlimited PU may stand for:Pickup (music), a part of an electric instrument which detects vibrations from a string.
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This article is about the radioactive element. For other meanings, see Plutonium (disambiguation). Plutonium (IPA: ) is a radioactive, metallic chemical element. It has the symbol Pu and the atomic number 94. It is the element used in most modern nuclear weapons. The most significant isotope of plutonium is 239Pu, with a half-life of 24,100 years. It can be made from natural uranium and is fissile. The most stable isotope is 244Pu, with a half-life of about 80 million years, long enough to be found in extremely small quantities in nature. In fact, 244Pu is the nucleon-richest atom that naturally occurs in the Earth's crust, albeit in small traces.
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Noun
1. a solid silvery gray radioactive transuranic element whose atoms can be split when bombarded with neutrons; found in minute quantities in uranium ores but is usually synthesized in nuclear reactors; 13 isotopes are known with the most important being plutonium 239
(synonym) plutonium, atomic number 94
(hypernym) chemical element, element
(hyponym) plutonium 239

Pu, plutonium, radioactive element (Chemistry)

v. graze, rub lightly against something

v. can, may; might, could

n. (also: Pu) plutonium, radioactive chemical element, actinide rare earth element