Plinlimmon

Plinlimmon (i.e. five rivers), a mountain 2469 ft. high, with three summits, on the confines of Montgomery and Cardigan, so called as source of five different streams.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Plimsoll, Samuel * Pliny, the Elder
Playfair, John
Pleiades
Pleiades, The
Plenist
Plesiosaurus
Pleura
Pleura-pneumonia
Plevna
Pleydell, Mr. Paulus
Plimsoll, Samuel
Plinlimmon
Pliny, the Elder
Pliny, the Younger
Plotinus
Plugston of Undershot
Plumptre, Edward Hayes
Plunket, Lord
Plutarch
Pluto
Plutonic Theory
Plutus