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.
Electronegativity is a measure of the attraction of an atom for the electrons in a chemical bond. The higher the electronegativity of an atom, the greater its attraction for bonding electrons.n example of an electropositive (i.e., low electronegativity) element is cesium; an example of a highly electronegative element is fluorine. 1  Moving left to right across the periodic table, electronegativity increases. 2  Moving top to bottom down the periodic table, electronegativity decreases.