As an adjective isomeric
is being an isomer.
As a noun decadiene is
any of several isomeric unsaturated alkenes having ten carbon atoms and two double bonds.
isomeric
English
Adjective
(-)
(chemistry, physics) Being an isomer.
(chemistry) Exhibiting isomerism.
decadiene
English
Noun
(
en noun)
(organic compound) Any of several isomeric unsaturated alkenes having ten carbon atoms and two double bonds