The mechanism of action of probiotics (e.g., having an impact on the intestinal microbiota or enhancing immune function) was dropped from the definition to encompass health effects due to novel mechanisms and to allow application of the term before the mechanism is confirmed.
Noun. 1. electronegativity - (chemistry) the tendency of an atom or radical to attract electrons in the formation of an ionic bond. negativity.
1 Electronegativity is the pull of electrons shared in a covalent bond by atoms. 2  In silicon dioxide the O (oxygen) atom has a stronger pull on the electrons than silicon, meaning it has a strong electronegativity and that the electrons shared in the covalent bond spend more time around the oxygen atom.