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Dictionary

di•ene

Pronunciation: (dī'ēn, dī-ēn'), [key]
—n. Chem.
any compound, as 1,3-butadiene, CH₂=CH-CH=CH₂, that contains two double bonds. Also called diolefin.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

diencephalon

die-off

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