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Answer for the clue "Pentane, e.g ", 6 letters:
isomer

Alternative clues for the word isomer

Word definitions for isomer in dictionaries

WordNet Word definitions in WordNet
n. a compound that exists in forms having different arrangements of atoms but the same molecular weight

Wikipedia Word definitions in Wikipedia
An isomer (; from Greek ἰσομερής, isomerès; isos = "equal", méros = "part") is a molecule with the same molecular formula as another molecule, but with a different chemical structure . That is, isomers contain the same number of atoms of each element, but ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1866, back-formation from isomeric . Greek isomeres meant "sharing equality," from iso- (see iso- ) + meros "part, share" (see merit (n.)).

Usage examples of isomer.

There was only one distillery, in orbit, with the facilities to selectively flip the isomers that produced the fascinating, distinctive taste of smoke whiskey.

Teller had returned to his office the morning after the conversion of the MANN, had routinely checked his files for corruption, and had found only a small change in the spatial simulation of a particular isomer he'd been investigating for antitumor activity.

Featured here was a new and admired strain, which had in addition been grown in ultraviolet light, converting some of the inert cannabinoids into the 1 Delta isomer.

I programmed it as a comparator of optical isomers for a first step in trying to detect where and how our instincts are imprinted on us.

I programmed it as a comparator of optical isomers for a first step in trying to detect where and how our instincts are imprinted on us.

It may well be -- I have believed so ever since I was fourteen years old -- that the elements are all isomers, differentiated by geometrical structure, electrical charge, or otherwise in precisely the same way as ozone from oxygen, red from yellow phosphorous, dextrose from ~laevulose, and a paraffin from a benzene of identical empirical formula.