1. The ordinal number of thirty-nine in counting order
   - thirty-ninth

See also: ordinal

• pfennig
• pfft
• PFLP
• PFLP-GC
• PG
• pH
• pH scale
• phacelia
• Phacelia campanularia
• Phacelia minor
• Phacelia tanacetifolia
• Phacelia whitlavia
• Phacochoerus
• phacoemulsification
• phaeochromocytoma
• Phaeophyceae
• Phaeophyta
• Phaethon
• Phaethontidae
• phaeton
• phage
• phagocyte
• phagocytic
• phagocytosis
• Phagun