Learn how to say Isotonicity correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word isotonicity:
(physiology) (of two or more muscles) the quality or state of having equal tension
(of a drink) the quality or state of being designed to replace the fluid and salts lost from the body during strenuous exercise
(of two solutions) the quality or state of having the same osmotic pressure, commonly having physiological osmotic pressure
(music) the quality or state of being of, relating to, or characterized by the equal intervals of the well-tempered scale