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toxoplasmosis

(Encyclopedia)toxoplasmosis, infection caused by Toxoplasma gondii, a single-celled parasitic microorganism that can infect most warm-blooded animals but reproduces only in animals of the cat family, who shed the p...

alien

(Encyclopedia)alien, in law, any person residing in one political community while owing allegiance to another. A procedure known as naturalization permits aliens to become citizens. Each nation establishes conditio...

easement

(Encyclopedia)easement, in law, the right to use the land of another for a specified purpose, as distinguished from the right to possess that land. If the easement benefits the holder personally and is not associat...

hay fever

(Encyclopedia)hay fever, seasonal allergy causing inflammation of the mucous membranes of the nose and eyes. It is characterized by itching about the eyes and nose, sneezing, a profuse watery nasal discharge, and t...

medicinal plants

(Encyclopedia)medicinal plants, plants used as natural medicines. This practice has existed since prehistoric times. There are three ways in which plants have been found useful in medicine. First, they may be used ...

opal

(Encyclopedia)opal ōˈpəl [key], a mineral consisting of poorly crystalline to amorphous silica, SiO2·nH2O; the water content is quite variable but usually ranges from 3% to 10%. Common opal is usually colorless...

asphyxia

(Encyclopedia)asphyxia ăsfĭkˈsēə [key], deficiency of oxygen and excess of carbon dioxide in the blood and body tissues. Asphyxia, often referred to as suffocation, usually results from an interruption of brea...

waxbill

(Encyclopedia)waxbill, common name for small, brightly colored weaver finches of the Estrildini tribe of the family Estrildidae. Most are African with the exception of two S Asian species of avadavats, and one Aust...

commutation of sentence

(Encyclopedia)commutation of sentence, in criminal law, reduction of a sentence for a criminal act by action of the executive head of the government. Like pardon, commutation of sentence is a matter of grace, not o...

Hystaspes

(Encyclopedia)Hystaspes hĭstăsˈpĭs [key], Old Persian Vishtaspa, fl. 6th cent. b.c., ruler of ancient Persia, father of Darius I. Under him Darius was governor of Parthia. The legendary patron of Zoroaster is a...