psychosomatic |
of or relating to physical diseases or disorders that are caused or aggravated by emotional factors. |
psychotherapy |
the science or technique of treating mental and emotional problems with psychological methods rather than drugs or medications. |
psychotomimetic |
pertaining to or designating drugs that tend to cause symptoms of a psychotic state. |
psychotoxic |
of, pertaining to, or designating an agent that causes brain damage, such as certain drugs, excessive alcohol, or the like. |
psychotropic |
affecting the activities of the mind, as a tranquilizer, hallucinogen, or the like. |
Pt |
symbol of the chemical element platinum. |
Pt. |
abbreviation of "Point." |
pt. |
abbreviation of "point." [2 definitions] |
PTA |
abbreviation of "Parent-Teacher Association." |
ptarmigan |
any of a variety of grouse that are found in cold, northern regions, and whose brown plumage is replaced by white in the winter. |
PT boat |
a small, swift, highly maneuverable torpedo boat, used esp. to patrol and torpedo enemy merchant ships. |
pteridophyte |
in some systems of classification, a division of plants that have true vascular roots, stems, and leaves and that reproduce by means of spores, such as ferns, club mosses, or horsetails. |
ptero- |
feather; wing. |
pterodactyl |
any of various extinct flying reptiles. |
pterosaur |
a flying reptile of the Mesozoic era characterized as having a birdlike beak and membranous wings supported by an exceptionally long fourth digit of each forelimb. |
-pterous |
having (such or so many) wings. |
Ptolemaic |
of or pertaining to Ptolemy or the system of astronomy he developed. |
Ptolemaic system |
the cosmographic theory, systematized by the Hellenistic astronomer Ptolemy, according to which all heavenly bodies revolve around the earth, which is fixed at the center of the universe. |
Ptolemy |
an Alexandrian mathematician, astronomer, and geographer (second century A.D.). [2 definitions] |
ptomaine |
any of a variety of basic nitrogenous substances, some poisonous, that are produced by the decay of protein. |
ptomaine poisoning |
poisoning caused by ingestion of a ptomaine, or food poisoning erroneously ascribed to this cause. |