pentane

[pen-teyn]
noun Chemistry, Pharmacology.
1.
a hydrocarbon of the methane series, existing in three liquid isomeric forms.
2.
Also called normal pentane. the most important isomer of pentane, a colorless, flammable, water-insoluble, very volatile liquid, C 5 H 1 2 , obtained from petroleum by distillation: used chiefly as a solvent and in medicine as an anesthetic.

Origin:
1875–80; pent- + -ane

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World English Dictionary
pentane (ˈpɛnteɪn)
 
n
an alkane hydrocarbon having three isomers, esp the isomer with a straight chain of carbon atoms (n-pentane) which is a colourless flammable liquid used as a solvent. Formula: C5H12

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American Heritage
Science Dictionary
pentane   (pěn'tān')  Pronunciation Key 
A colorless, flammable hydrocarbon derived from petroleum and used as a solvent. Pentane occurs in three isomers and is the fifth member of the alkane series. Chemical formula: C5H12.
The American Heritage® Science Dictionary
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Example sentences
If someone is certifiably nuts, their breath may have notes of ether and pentane, according to one study.
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