MDA n. 1. 3,4-methylenedioxyamphetamine: a synt...
photopigment n. a substance in a retinal rod or retinal con...
oral-receptive personality see oral personality.
vestibular nystagmus involuntary eye movements consisting o...
hierarchization n. in Piagetian theory, the process whereby...
nonexperimental adj. denoting a research project that is la...