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pentameter

(Encyclopedia)pentameter pĕntămˈətər [key] [Gr.,=measure of five], in prosody, a line to be scanned in five feet (see versification). The third line of Thomas Nashe's “Spring” is in pentameter: “Cold dot...

weather balloon

(Encyclopedia)weather balloon, balloon used in the measurement and evaluation of mostly upper atmospheric conditions (see atmosphere). Information may be gathered during the vertical ascent of the balloon through t...

squid

(Encyclopedia)squid, carnivorous marine cephalopod mollusk. The squid is one of the most highly developed invertebrates, well adapted to its active, predatory life. The characteristic molluscan shell is reduced to ...

Proulx, E. Annie

(Encyclopedia)Proulx, E. Annie (Edna Annie Proulx) pro͞o [key], 1935–, American writer, b. Norwich, Conn., grad. Univ. of Vermont (B.A., 1969), Sir George Williams (now Concordia) Univ., Montreal (M.A., 1973). S...

neutron

(Encyclopedia)neutron, uncharged elementary particle of slightly greater mass than the proton. It was discovered by James Chadwick in 1932. The stable isotopes of all elements except hydrogen and helium contain a n...

bubble chamber

(Encyclopedia)bubble chamber, device for detecting charged particles and other radiation by means of tracks of bubbles left in a chamber filled with liquid hydrogen or other liquefied gas. It was invented in 1952 b...

rain

(Encyclopedia)rain, precipitation in liquid form. It consists of drops of water falling from clouds; if the drops are very small, they are collectively termed drizzle. Rain plays a key role in the hydrologic, or wa...

dust, atmospheric

(Encyclopedia)dust, atmospheric, minute particles slowly settling or suspended by slight currents and existing in varying amounts in all air. There is least dust at high levels over the ocean and most at low levels...

neutrino astronomy

(Encyclopedia)neutrino astronomy, study of stars by means of their emission of neutrinos, fundamental particles that result from nuclear reactions and are emitted by stars along with light. Approximately 100 billio...

Æthelred, king of England

(Encyclopedia)Æthelred, 965?–1016, king of England (978–1016), called Æthelred the Unready [Old Eng. unrœd=without counsel]. He was the son of Edgar and the half-brother of Edward the Martyr, whom he succeed...