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Apatosaurus

(Encyclopedia)Apatosaurus ăpˌətəsôrˈəs, āˌpătˌə– [key], [Gr.,=deceptive lizard], quadruped saurischian dinosaur, estimated to be from 70 to 90 ft (21 to 27 m) in length and to weigh up to 30 tons (27 ...

Lalique, René

(Encyclopedia)Lalique, René rənāˈ lälēkˈ [key], 1860–1945, French jewelery designer and glassmaker whose works are landmarks of arts nouveau and deco, b. Ay; apprenticed to Parisian goldsmith Louis Aucoq a...

Katmai National Park and Preserve

(Encyclopedia)Katmai National Park and Preserve kătˈmī [key], at the northern end of the Alaska Peninsula on Shelikof Strait, S Alaska, comprising Katmai National Park (3,674,530 acres/1,487,664 hectares) and an...

dentition

(Encyclopedia)dentition, kind, number, and arrangement of the teeth of humans and other animals. During the course of evolution, teeth were derived from bony body scales similar to the placoid scales on the skin of...

chromosome

(Encyclopedia)chromosome krōˈməsōmˌ [key], structural carrier of hereditary characteristics, found in the nucleus of every cell and so named for its readiness to absorb dyes. The term chromosome is usually res...

ectoderm

(Encyclopedia)ectoderm, layer of cells that covers the surface of an animal embryo after the process of gastrulation has occurred. This outer layer, together with the endoderm, or inner layer, is present in all ear...

Ectoprocta

(Encyclopedia) CE5 Bugula, a moss animal, representative of the phylum Ectoprocta Ectoprocta ĕkˌtəprŏkˈtə [key], phylum of sessile, colonial aquatic animals (commonly known as moss animals or oryonzoans). ...

hamster

(Encyclopedia)hamster, Old World rodent, related to the voles, lemmings, and New World mice. There are many hamster species, classified in several genera. All are solitary, burrowing, nocturnal animals, with chunky...

glove

(Encyclopedia)glove, hand covering with a separate sheath for each finger. The earliest gloves, relics of the cave dwellers, closely resembled bags. Reaching to the elbow, they were most probably worn solely for pr...

serotonin

(Encyclopedia)serotonin sĕrˌətōˈnĭn [key], organic compound that was first recognized as a powerful vasoconstrictor occurring in blood serum. It was partially purified, crystallized, and named in 1948, and it...
 

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