the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
the way two individuals relate to each other; "their chemistry was wrong from the beginning -- they hated each other"; "a mysterious alchemy brought them together"
a set of techniques for exploring underlying motives and a method of treating various mental disorders; based on the theories of Sigmund Freud; "his physician recommended psychoanalysis"
any disease of the mind; the psychological state of someone who has emotional or behavioral problems serious enough to require psychiatric intervention
a clear and telling mental image; "he described his mental picture of his assailant"; "he had no clear picture of himself or his world"; "the events left a permanent impression in his mind"
a measure of a person's intelligence as indicated by an intelligence test; the ratio of a person's mental age to their chronological age (multiplied by 100)