when

there is obstruction to outflow, compen'- satory h., increase in size of an organ or part of an organ or ti ue, when called upon to do the work of a disabled or destroyed synergist, compen's atory h. of the heart, thickening of the walls of the heart in cases of valvular disease, either obstruction or insufficiency, complemen'taiy h., increase in size or expansion of part of an organ or ti ue to fill the space left by the destruction of another portion of the same organ or ti ue. concen'tric h., thickening of the walls of the heart or any cavity with apparent diminution of the capacity of the cavity, excen'tric h., thickening of the wall of the heart or other cavity, with dilatation, false h., pseudo hypertrophy, increase in bulk of a part, as of a muscle, due to overgrowth of the fibrous stroma and not of the ti ue proper, func'tional h., physiological h. numer'- ical h., h. of a ti ue with increase in the number, 1 as well as in the size, of its elements, hyperplasia. physio log'ical h., temporary increase in size of an organ or part to provide for a natural increase of function such as occurs in the walls of the uterus and in the during pregnancy. pseudomus'cular h., pseudo hypertrophic paralysis.* quan'titative h., hyperplasia, simple h., num.erical h. sim'ulated h., increased size of a part due to continued growth unrestrained by attrition, as is seen in the case of the teeth of certain animals when the opposing teeth have been destroyed, true h., an increase in size involving all the different ti ues composing the part, vic a'rlous h., h. of an organ in case of failure of another organ of different order though apparently allied function; enlargement of the pituitary gland, after destruction of the thyroid, is an example.