| PT | sea lilies |
|---|---|
| PT | bowerbirds |
| PT | type genus of the Ptilonorhynchidae |
| PT | of southeast Australia |
| PT | a genus of Paradisaeidae |
| PT | velvety black Australian bird of paradise with green and purple iridescence on head and tail |
| PT | of or relating to the geocentric Ptolemaic system |
| PT | of or relating to the astronomer Ptolemy |
| PT | Ptolemy's model of the universe with the Earth at the center |
| PT | Alexandrian astronomer who proposed a geocentric system of astronomy that was undisputed until Copernicus (2nd century AD) |
| PT | any of various amines (such as putrescine or cadaverine) formed by the action of putrefactive bacteria |
| PT | a term for food poisoning that is no longer in scientific use |