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Radii

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Mục lục

Noun

a pl. of radius.

Noun, plural -dii

a straight line extending from the center of a circle or sphere to the circumference or surface
The radius of a circle is half the diameter.
the length of such a line.
any radial or radiating part.
a circular area having an extent determined by the length of the radius from a given or specified central point
every house within a radius of 50 miles.
a field or range of operation or influence.
extent of possible operation, travel, etc., as under a single supply of fuel
the flying radius of an airplane.
Anatomy . the bone of the forearm on the thumb side. Compare ulna ( def. 1 ) .
Zoology . a corresponding bone in the forelimb of other vertebrates.
Machinery Now Rare . the throw of an eccentric wheel or cam.
a rounded corner or edge on a machined or cast piece of metal.
Entomology . one of the principal longitudinal veins in the anterior portion of the wing of an insect.

Xem thêm các từ khác

  • Radio

    wireless telegraphy or telephony, an apparatus for receiving or transmitting radio broadcasts., a message transmitted by radio., pertaining to, used in,...

  • Radio beacon

    a radio station that sends a characteristic signal so as to enable ships or airplanes to determine their position or bearing by means of a radio compass.,...

  • Radio beam

    beam ( def. 12 ) .

  • Radio frequency

    the frequency of the transmitting waves of a given radio message or broadcast., a frequency within the range of radio transmission, from about 15,000 to...

  • Radio station

    station ( def. 8 ) .

  • Radioactive

    of, pertaining to, exhibiting, or caused by radioactivity.

  • Radioactivity

    the phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms...

  • Radiobiology

    the branch of biology dealing with the effects of radiation on living matter.

  • Radiobroadcasting

    a broadcast by radio., to broadcast by radio.

  • Radiochemistry

    the chemical study of radioactive elements, both natural and artificial, and their use in the study of chemical processes.

  • Radiogenic

    physics . produced by radioactive decay, having qualities or characteristics that broadcast well; suitable for presentation on the radio., radiogenic lead...

  • Radiogram

    a message transmitted by radiotelegraphy.

  • Radiograph

    also called shadowgraph. a photographic image produced by the action of x-rays or nuclear radiation., to make a radiograph of.

  • Radiography

    the production of radiographs.

  • Radioisotope

    a radioactive isotope, usually artificially produced, used in physical and biological research , therapeutics , etc .

  • Radiolocation

    the method or process of determining the position and velocity of an object by radar.

  • Radiology

    the science dealing with x-rays or nuclear radiation, esp. for medical uses., the examination or photographing of organs, bones, etc., with such rays.,...

  • Radioman

    a person who operates a radio.

  • Radiometer

    also called crookes radiometer. an instrument for demonstrating the transformation of radiant energy into mechanical work, consisting of an exhausted glass...

  • Radiophare

    a radiotelegraphic station used by vessels to determine their positions; radio beacon.
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