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John XXII, pope

(Encyclopedia)John XXII, 1244–1334, pope (1316–34), a Frenchman (b. Cahors) named Jacques Duèse; successor of Clement V. Formerly, he was often called John XXI. He reigned at Avignon. John was celebrated as a ...

optics

(Encyclopedia)optics, scientific study of light. Physical optics is concerned with the genesis, nature, and properties of light; physiological optics with the part light plays in vision; and geometrical optics with...

nearsightedness

(Encyclopedia)nearsightedness or myopia, defect of vision in which far objects appear blurred but near objects are seen clearly. Because the eyeball is too long or the refractive power of the eye's lens is too stro...

Ezekiel

(Encyclopedia)Ezekiel ēzēˈkēĕl [key], prophetic book of the Bible. The book is a collection of oracles emanating from the career of the priest Ezekiel, who preached to Jews of the Babylonian captivity from 593...

Hilversum

(Encyclopedia)Hilversum hĭlˈvərsəm [key], city, North Holland prov., central Netherlands. It is the center of ...

astigmatism

(Encyclopedia)astigmatism əstĭgˈmətĭzˌəm [key], type of faulty vision caused by a nonuniform curvature in the refractive surfaces—usually the cornea, less frequently the lens—of the eye. As a result, lig...

Jaazaniah

(Encyclopedia)Jaazaniah jāˌāzənīˈə [key], in the Bible. 1 Head of a number of idolatrous priests whom Ezekiel saw in a vision. 2 Captain active in the politics of Palestine at the time of the fall of Jerusal...

Saint Michael's Mount

(Encyclopedia)Saint Michael's Mount, pyramid-shaped rocky islet, 21 acres (8.5 hectares), Cornwall, SW England, in Mounts Bay; it rises to more than 200 ft (61 m). A natural causeway connects it at low tide with th...

iritis

(Encyclopedia)iritis īrīˈtĭs [key], inflammation of the iris, the pigmented portion of the eye surrounding the pupil. The condition is sometimes associated with diabetes, with rheumatic diseases such as rheumat...

Ladd-Franklin, Christine

(Encyclopedia)Ladd-Franklin, Christine, 1847–1930, American scientist, b. Windsor, Conn., grad. Vassar 1869. She was the first woman student to enter Johns Hopkins (1878), her special studies being directed towar...