an alkane existing in nine isomeric forms, esp the isomer with a straight chain of carbon atoms (n-heptane), which is found in petroleum and used as an anaesthetic. Formula: C7H16
Word origin
C19: from hepta- + -ane, so called because it has seven carbon atoms
heptane in American English
(ˈhɛpˌteɪn)
noun
an alkane, C7H16, existing in several isomeric forms: the normal isomer is used in standard mixtures to test octane ratings