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boomerang

(Encyclopedia)boomerang bo͞oˈmərăngˌ [key], special form of throwing stick, used mainly by the aborigines of Australia. Other forms of throwing sticks were used by the peoples of ancient Egypt, Ethiopia, and I...

Baldovinetti, Alesso

(Encyclopedia)Baldovinetti, Alesso älāsˈsō bäldōvēnĕtˈtē [key], c.1425–1499, Italian painter and decorative artist of the early Florentine Renaissance. He was probably trained in the workshops of Domeni...

Richardson, Lewis Fry

(Encyclopedia)Richardson, Lewis Fry, 1881–1953, British physicist and pioneering meteorologist, grad. Cambridge (1903), Univ. of London (B.Sc. 1929). Richardson worked at the National Physical Laboratory (1902–...

nuclear energy

(Encyclopedia)CE5 Graph of binding energy per nucleon as a function of mass number nuclear energy, the energy stored in the nucleus of an atom and released through fission, fusion, or radioactivity. In these pr...

destroyer

(Encyclopedia)destroyer, class of warship very fast relative to its length, generally equipped with torpedos, antisubmarine equipment, and medium-caliber and antiaircraft guns. The newest destroyers are equipped wi...

Fernández de Córdoba, Gonzalo

(Encyclopedia)Fernández de Córdoba, Gonzalo fārnänˈdāth dā kōrˈdōbä [key], 1453–1515, Spanish general, called the Great Captain. He fought in the civil wars preceding and following the accession of Is...

navy

(Encyclopedia)navy, originally, all ships of a nation, whether for war or commerce; the term navy now designates only such vessels as are built and maintained specifically for war. There have been three major devel...

Doppler effect

(Encyclopedia)Doppler effect, change in the wavelength (or frequency) of energy in the form of waves, e.g., sound or light, as a result of motion of either the source or the receiver of the waves; the effect is nam...

gorilla

(Encyclopedia)gorilla, an ape, genus Gorilla, native to the lowland and mountain forests of western and central equatorial Africa. The two gorilla species are the western, comprising the western lowland (G. gorilla...

bow and arrow

(Encyclopedia)bow and arrow, weapon consisting of two parts; the bow is made of a strip of flexible material, such as wood, with a cord linking the two ends of the strip to form a tension from which is propelled th...