noun
: the ratio of chemical activity to actual concentration : an arbitrary quantity that in the case of solutions is a measure of the deviation of a more or less concentrated solution from an ideal solution
noun
: the ratio of chemical activity to actual concentration : an arbitrary quantity that in the case of solutions is a measure of the deviation of a more or less concentrated solution from an ideal solution
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012