1. More familiar or renowned than the other of two
   "the better-known book of the two"

See also: known

• family Pinnotheridae
• family Piperaceae
• family Pipidae
• family Pipridae
• family Pittidae
• family planning
• family Plantaginaceae
• family Plasmodiidae
• family Plasmodiophoraceae
• family Plataleidae
• family Platanaceae
• family Platanistidae
• family Platycephalidae
• family Plethodontidae
• family Pleurobrachiidae
• family Pleuronectidae
• family Ploceidae
• family Plumbaginaceae
• family Pluteaceae
• family Poaceae
• family Podargidae
• family Podicipedidae
• family Podocarpaceae
• family Poeciliidae
• family Polemoniaceae