French noblewoman who was the mistress of Henry II; she had more influence over him than did his wife Catherine de Medicis (1499-1566)

French noblewoman who was the mistress of Henry II; she had more influence over him than did his wife Catherine de Medicis (1499-1566)

French noblewoman who was the mistress of Henry II; she had more influence over him than did his wife Catherine de Medicis (1499-1566)

the act of offering an improvement to replace a mistake; setting right

the act of offering an improvement to replace a mistake; setting right

the act of offering an improvement to replace a mistake; setting right

the act of offering an improvement to replace a mistake; setting right

(chemistry) an ionic compound that resists changes in its pH

(chemistry) an ionic compound that resists changes in its pH

(chemistry) separation of a substance into two or more substances that may differ from each other and from the original substance