Skip to main content Skip to Search Box
183 Topic Pages Found in Science and starting with the letter P
Details List
All A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Open Pachyrhizus erosus
Pachyrhizus erosus

Native to Central America, jicama is now cultivated in every tropical corner of the globe. It is a popular vegetable in Mexico, as well as in

Open Pacific Ocean
Pacific Ocean

largest and deepest ocean, c.70,000,000 sq mi (181,300,000 sq km), occupying about one third of the earth's surface; named by the explorer Ferdinand

Open Pain
Pain

unpleasant or hurtful sensation resulting from stimulation of nerve endings. The stimulus is carried by nerve fibers to the spinal cord and then to

Paint

Any of various materials used to give a protective and decorative finish to surfaces or for making pictures. A paint consists of a pigment suspended

Palade, G. E.

Romanian cell biologist who was awarded a Nobel Prize for Physiology or Medicine in 1974 with Albert Claude and Christian René de Duve for work on the

Open paleontology
paleontology

( pā´´lēəntŏl'əjē ) [Gr.,= study of early beings], science of the life of past geologic periods based on fossil remains. Knowledge of the existence of

Open Palladium
Palladium

[Gr. Pallas, goddess of wisdom], metallic chemical element; symbol Pd; at. no. 46; at. wt. 106.42; m.p. 1,554 degrees Celsius; b.p. 2,970 degrees

pancreas

( păn'krēəs ), glandular organ that secretes digestive enzymes and hormones. In humans, the pancreas is a yellowish organ about 7 in. (17.8 cm) long

pangolin

Toothless mammal of tropical Africa and Southeast Asia. They are long-tailed and covered with large, overlapping scales, except on the muzzle, sides

Open Papaya
Papaya

A tropical herb, papaya ( Carica papaya ) resembles a tree in size and shape to such an extent that the novice is apt to misidentify a papaya plant as