Hypothalamic Amenorrhea. Amenorrhea simply means the absence of menstruation (one or more missed menstrual periods), and it can be caused by a variety of things, including problems with the reproductive organs or hormones.
Normality is an ambiguous measure of the concentration of a solution. It needs a definition of the equivalence factor, which depends on the definition of equivalents. The same solution can possess different normalities for different reactions.
Home Â» Polarity. Definition. noun. (1) The presence of or having distinct and opposite poles. (2) The condition of having contrasting properties or direction. (3) (chemistry) The tendency of forming distinctive opposing charges based on the orientation of chemical bonds and spatial structure of the molecule.