Prosthapheresis, a. [146].

Provinces (of plants and animals), b. [562].

Prutenic tables, a. [270].

Pulses, b. [33].

Pyrites, b. [352].

Quadrant, a. [164]

Quadrivium, a. [199].

Quiddity, a. [234]. [37]

Quinary division (in Natural History), b. [418].

Quintessence, a. [73].