1. Having the shape of a ring

See also: circular, round

• pewter
• Peyer's patch
• peyote
• Peyton Rous
• Peziza
• Peziza coccinea
• Peziza domicilina
• Pezizaceae
• Pezizales
• Pezophaps
• Pezophaps solitaria
• Pfalz
• pfannkuchen
• PFC
• pfennig
• pfft
• PFLP
• PFLP-GC
• PG
• pH
• pH scale
• phacelia
• Phacelia campanularia
• Phacelia minor
• Phacelia tanacetifolia