1. A wooden peg that is used to fasten timbers in shipbuilding; water causes the peg to swell and hold the timbers fast
   - treenail, trunnel

Derived forms: trenails

Type of: nog, peg

• genus Physostegia
• genus Physostigma
• genus Phytelephas
• genus Phytolacca
• genus Phytophthora
• genus Pica
• genus Picea
• genus Pickeringia
• genus Picoides
• genus Picrasma
• genus Picris
• genus Picumnus
• genus Picus
• genus Pieris
• genus Pilea
• genus Pilosella
• genus Pilularia
• genus Pimenta
• genus Pimpinella
• genus Pinckneya
• genus Pinctada
• genus Pineus
• genus Pinguicula
• genus Pinguinus
• genus Pinicola