1. A crossbar of wood in a shaft, serving as a step

Derived forms: stemples

• Psilophytaceae
• Psilophytales
• psilophyte
• psilophyton
• Psilopsida
• psilosis
• Psilotaceae
• Psilotales
• Psilotatae
• Psilotum
• Psilotum nudum
• Psithyrus
• Psittacidae
• Psittaciformes
• psittacosaur
• psittacosaurus
• psittacosis
• Psittacula
• Psittacula krameri
• Psittacus
• Psittacus erithacus
• psoas
• psocid
• Psocidae
• Psocoptera