Ethenic

E·then'ic adjective (Chemistry) Pertaining to, derived from. or resembling, ethene or ethylene; as, ethenic ether.
Found on http://www.encyclo.co.uk/webster/E/70

Ethenic

• (a.) Pertaining to, derived from. or resembling, ethene or ethylene; as, ethenic ether.
Found on http://thinkexist.com/dictionary/meaning/ethenic/
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