chemoreceptor (kÄÂ´mÅrÄsepÂ´tÉr) , n a specialized sensory end organ adapted for excitation by chemical substances (e.g., olfactory and gustatory receptors) or specialized sense organs of the carotid body that are sensitive to chemical changes in the bloodstream.
Nicolaus Copernicus was born on 19 February 1473 in the city of ToruÅ (Thorn), in the province of Royal Prussia, in the Crown of the Kingdom of Poland.His father was a merchant from Krakow krakÃ³w and his mother was the daughter of a Wealthy toruÅ. Merchant nicolaus was the youngest of four. childrenopernicus was born and died in Royal Prussia, a region that had been a part of the Kingdom of Poland since 1466. He was a polyglot and polymath who obtained a doctorate in canon law and also practiced as a physician, classics scholar, translator, governor, diplomat, and economist.
Copernicus, Nicholaus (1473-1543) Polish name: Mikolaj Kopernik. Polish astronomer and mathematician who, as a student, studied canon law, mathematics, and medicine at Cracow, Bologna, Rome, Padua, and Ferrara. Copernicus became interested in astronomy and published an early description of his heliocentric model of the solar system in Commentariolus (1512).