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period, in physics

(Encyclopedia)period, in physics: see harmonic motion; wave. ...

Ariel, in astronomy

(Encyclopedia)Ariel ârˈēəl [key], in astronomy, one of the moons, or natural satellites, of Uranus. ...

may, in botany

(Encyclopedia)may, name for several plants; in England, particularly the hawthorn. See also mayflower. ...

quadrant, in technology

(Encyclopedia)quadrant, in technology, angle-measuring device based on a scale of 90°. It is sometimes confused with the sextant, a similar instrument based on a scale of 60°. The quadrant is rarely used today. ...

scale, in cartography

(Encyclopedia)scale, in cartography, the ratio of the distance between two points on a map to the real distance between the two corresponding points portrayed. The scale may be expressed in three ways: numerically,...

Gattinara, Mercurino Arborio, marchese di

(Encyclopedia)Gattinara, Mercurino Arborio, marchese di mĕrco͞orēˈnō ärbôˈrēō märkĕˈza dē gätˌtēnäˈrä [key], 1465–1530, Italian statesman and jurist, cardinal of the Roman Catholic Church. Aft...

Cajetan

(Encyclopedia)Cajetan [Lat.,=from Gaeta], 1469?–1534, Italian prelate, cardinal of the Roman Catholic Church, b. Gaeta. His original name was Giacomo de Vio. He joined the Dominicans (c.1484), became general of t...

Metis, in astronomy

(Encyclopedia)Metis mēˈtĭs [key], in astronomy, one of the 39 known moons, or natural satellites, of Jupiter. ...

Leda, in astronomy

(Encyclopedia)Leda lēˈdə [key], in astronomy, one of the 39 known moons, or natural satellites, of Jupiter. ...

Triton , in astronomy

(Encyclopedia)Triton trītˈən [key], in astronomy, innermost and largest of the eight known moons, or natural satellites, of Neptune. ...