13-Letter Words Containing: I,S,T,O,R,S

• The scientific study of psychology and motivation in history.

• use an apostrophe

• failure of one or both testes to move into the scrotum as the male fetus develops

• affecting the mind or mood or other mental processes

• a motile male gamete of a plant such as an alga or fern or gymnosperm

• any branch of psychology concerned with psychological measurements