| PS | an order of insects: includes booklice and barklice |
|---|---|
| PS | small soft-bodied insect with chewing mouthparts and either no wings or two pairs |
| PS | type genus of the Psophiidae: trumpeters |
| PS | trumpeter of Brazil and Guiana |
| PS | trumpeters |
| PS | species of tropical Asian and African climbing herbs |
| PS | tuberous-rooted twining annual vine bearing clusters of purplish flowers and pods with four jagged wings |
| PS | widely distributed genus of herbs or shrubs with glandular compound leaves and spicate or racemose purple or white flowers |
| PS | densely hairy perennial of central North America having edible tuberous roots |
| PS | a chronic skin disease characterized by dry red patches covered with scales |
| PS | a form of rheumatoid arthritis usually affecting fingers and toes and associated with psoriasis |
| PS | standard time in the 8th time zone west of Greenwich, reckoned at the 120th meridian west |