Top Definition
"The intrinsic or indispensable properties that serve to characterize or identify something." ~ thefreedictionary.com

An element that is crucial

Something a stupid person says to look intelligent

Annoying praise people constantly say in the midwest
In essence, organic chemistry is all about the interaction between electron-rich atoms or molecules and electron-defciant atoms or molecules.
by FKNGregg September 28, 2011

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