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 the tendency of an atom/molecule to attract electrons; oxidation number is an indicator of its bonding environment. Apply the rules for assigning oxidation numbers to atoms in compounds. An atom's electronegativity is affected by both the element's atomic number and its size.