(Encyclopedia) geodegeodejēˈōd [key], hollow, globular rock nodule ranging in diameter from 1 to 12 in. (2.54–30.5 cm) or more. Most geodes are partly filled with mineral matter; they have a thin…
(Encyclopedia) foreign exchange, methods and instruments used to adjust the payment of debts between two nations that employ different currency systems. A nation's balance of payments has an…
(Encyclopedia) morainemorainemərānˈ [key], a formation composed of unsorted and unbedded rock and soil debris called till, which was deposited by a glacier. The till that falls on the sides of a…
(Encyclopedia) autogiroautogiroôtōjīˈrō [key] or gyroplanegyroplanejīˈrəplān [key], type of aircraft supported in the air by a horizontally mounted airfoil similar to that of a helicopter but…
(Encyclopedia) neostigmineneostigminenēˌōstĭgˈmēn, –mĭn [key], drug used to mimic the effects of stimulation of the parasympathetic nervous system. Along with several other drugs that have a similar…
(Encyclopedia) NuerNuern&oomacr;ˈər, n&oobreve;r [key], a Nilotic people living around Lake No in South Sudan. Their economy and social life generally revolve around cattle, which are grazed…
(Encyclopedia) Luria or Loria, Isaac ben SolomonLuria or Loria, Isaac ben Solomonl&oobreve;rˈēə, lôrˈ– [key], 1534–72, Jewish kabbalist, surnamed Ashkenazi, called Ari [lion] by his followers, b…
(Encyclopedia) Calderón de la Barca, PedroCalderón de la Barca, Pedropāˈᵺrō käldārōnˈ dā lä bärˈkä [key], 1600–1681, Spanish dramatist, last important figure of the Spanish Golden Age, b. Madrid.…
(Encyclopedia) Cass, Lewis, 1782–1866, American statesman, b. Exeter, N.H. He established (1802) himself as a lawyer in Zanesville, Ohio, became a member (1806) of the state legislature, and was U.S…
