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selection

(Encyclopedia)selection. In Darwinism, the mechanism of natural selection is considered of major importance in the process of evolution. Popular formulations sometimes envisage a struggle for existence in which dir...

carbon monoxide

(Encyclopedia)carbon monoxide, chemical compound, CO, a colorless, odorless, tasteless, extremely poisonous gas that is less dense than air under ordinary conditions. It is very slightly soluble in water and burns ...

euthanasia

(Encyclopedia)euthanasia yo͞oˌthənāˈzhə [key], either painlessly putting to death or failing to prevent death from natural causes in cases of terminal illness or irreversible coma. The term comes from the Gre...

first aid

(Encyclopedia)first aid, immediate and temporary treatment of a victim of sudden illness or injury while awaiting the arrival of medical aid. Proper early measures may be instrumental in saving life and ensuring a ...

cloth of gold

(Encyclopedia)cloth of gold, fabric woven wholly or partly of gold threads. From remote times gold has been used as material for weaving either alone or with other fibers. In India tapestries were made from gold th...

camouflage

(Encyclopedia)camouflage kămˈəfläzh [key], in warfare, the disguising of objects with artificial aids, especially for the purpose of making them blend into their surroundings or of deceiving the observer as to ...

tanning

(Encyclopedia)tanning, process by which skins and hides are converted into leather. Vegetable tanning, a method requiring more than a month even with modern machinery and tanning liquors, employs tannin; its use is...

taxidermy

(Encyclopedia)taxidermy tăkˈsĭdûrˌmē [key], process of skinning, preserving, and mounting vertebrate animals so that they still appear lifelike. The fur or feathers are cleaned, and the skin, treated with a c...

beta particle

(Encyclopedia)beta particle, one of the three types of radiation resulting from natural radioactivity. Beta radiation (or beta rays) was identified and named by E. Rutherford, who found that it consists of high-spe...

Intracoastal Waterway

(Encyclopedia)Intracoastal Waterway, c.3,000 mi (4,827 km) long, partly natural, partly artificial, providing sheltered passage for commercial and leisure boats along the U.S. Atlantic coast from Boston, Mass. to K...