pernicious anemia (Addison's anemia, malignant anemia.)
Severe anemia in older adults, caused by failure absorb vitamin B12;
causes abnormally large red blood cells, gastrointestinal disturbances,
and lesions of the spinal cord.

pharyngitis
Inflammation of the pharynx.

phenacetine (phenacetin)
White, crystalline compound, C10H13O2N, used as an antipyretic.

phlox
North American plants of the genus Phlox, having opposite leaves and
flowers.

phytolacca decandra (Scoke, Poke, Pokeweed)
Tall coarse perennial American herb with small white flowers followed by
blackish-red berries on long drooping racemes; young fleshy stems are
edible; berries and root are poisonous.

picric acid
Poisonous, yellow crystalline solid, C6H2(NO2)3OH, used in explosives,
dyes, and antiseptics.

piece de resistance
Outstanding accomplishment. Principal dish of a meal.

pilocarpus
Small tropical American shrubs (family Rutaceae) with small greenish