WorldAtomic Energy Board to Report Iran to the UN (Feb. 4): At an emergency meeting of the International Atomic Energy Agency, board members vote to refer Iran to the Security Council, citing its…
COMMON PARTICLESMINERAL MIXTURESPARTICLE SIZESOLUTIONSFIND OUT MOREAlmost everything is made of different substances mixed together. Things are only easy to recognize as mixtures if the PARTICLE…
(Encyclopedia) Louis the Younger, c.830–882, German king, ruler (876–82) over Saxony, Franconia, and Thuringia, son of Louis the German. He shared the succession to his father's lands with his…
(Encyclopedia) Mardi GrasMardi Grasmärˈdē grä [key], last day before the fasting season of Lent. It is the French name for Shrove Tuesday. Literally translated, the term means “fat Tuesday” and was…
(Encyclopedia) amenorrheaamenorrheaāmĕnˌərēˈa, əmĕnˌ– [key], cessation of menstruation. Primary amenorrhea is a delay in or a failure to start menstruation; secondary amenorrhea is an unexpected stop…
(Encyclopedia) hydrogenationhydrogenationhīdrôjˈənāˌshən, hīˌdrəjənāˈshən [key], chemical reaction of a substance with molecular hydrogen, usually in the presence of a catalyst. A common…
(Encyclopedia) emu or emeuemuboth: ēˈmy&oomacr; [key], common name for a large, flightless bird of Australia, related to the cassowary and the ostrich. There is only one living species, Dromaius…
(Encyclopedia) fats and oils, group of organic substances that form an important part of the diet and also are useful in many industries. The fats are usually solid, the oils generally liquid at…
violinist, conductorBorn: 4/22/1916Birthplace: New York City violin virtuoso who had impressed audiences since the age of seven with his musical gift. At age 13, he inspired Albert Einstein to…
(Encyclopedia) Dwight, John, fl. 1671–98, English potter, reputed founder of the Chelsea porcelain factory. The registration in 1671 of his patent for the “Mistery of transparent earthenware …” is…
