Hypertext Webster Gateway: "isomeric"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Isomeric \I`so*mer"ic\, a. [Iso- + Gr. me`ros part: cf. F.
isom['e]rique.] (Chem.)
Having the same percentage composition; -- said of two or
more different substances which contain the same ingredients
in the same proportions by weight, often used with with.
Specif.:
(a) Polymeric; i. e., having the same elements united in the
same proportion by weight, but with different molecular
weights; as, acetylene and benzine are isomeric
(polymeric) with each other in this sense. See
{Polymeric}.
(b) Metameric; i. e., having the same elements united in the
same proportions by weight, and with the same molecular
weight, but which a different structure or arrangement of
the ultimate parts; as, ethyl alcohol and methyl ether
are isomeric (metameric) with each other in this sense.
See {Metameric}.
From WordNet (r) 1.7 (wn)
isomeric
adj : of or relating to or exhibiting isomerism
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