311. Pleurodynia means severe pain in the muscles between the ribs or in the diaphragm
312. Plew means a beaver skin
313. Pneumonoultramicroscopicsilicovolcanoconiosis means an invented term said to mean 'a lung disease caused by inhaling very fine ash and sand dust', but rarely used except for its curiosity value
314. Pogey means unemployment or welfare benefit
315. Pollex means the thumb
316. Pooter means a suction bottle for collecting insects and other small invertebrates
317. Portolan means a book containing sailing directions with hand-drawn charts and descriptions of harbors and coasts
318. Posology means the branch of medicine concerned with the size and frequency of doses of a medicine or a drug
319. Possident means a possessor, i.e. a person who owns something
320. Pother means a commotion or fuss