| PS | a unit of pressure |
|---|---|
| PS | a neutral meson with a large mass |
| PS | guavas |
| PS | small tropical shrubby tree bearing deep red oval fruit |
| PS | small tropical American shrubby tree |
| PS | South American tree having fruit similar to the true guava |
| PS | small tropical shrubby tree bearing small yellowish fruit |
| PS | small tropical shrubby tree bearing deep red oval fruit |
| PS | a hallucinogenic compound obtained from a mushroom |
| PS | a hallucinogenic compound obtained from a mushroom |
| PS | a mineral consisting of hydrated basic oxide of manganese and barium |
| PS | Paleozoic plants |