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radiative

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ra⋅di⋅a⋅tive

  [rey-dee-ey-tiv]
Use radiative in a Sentence
–adjective
giving off radiation.
Also, ra⋅di⋅a⋅to⋅ry  [rey-dee-uh-tawr-ee, -tohr-ee] .

Origin:
1830–40; radiat(ion) + -ive
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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ra·di·ate   (rā'dē-āt')   
v.   ra·di·at·ed, ra·di·at·ing, ra·di·ates

v.   intr.

  1. To send out rays or waves.

  2. To issue or emerge in rays or waves: Heat radiated from the stove.

  3. To extend in straight lines from or toward a center; diverge or converge like rays: Spokes radiate from a wheel hub.

  4. Ecology To spread into new habitats and thereby diverge or diversify. Used of a group of organisms.

v.   tr.

  1. To emit (light, for example) in or as if in rays.

  2. To send or spread out from or as if from a center: a cactus that radiates spines.

  3. To irradiate or illuminate (an object).

  4. To manifest in a glowing manner: a leader who radiates confidence.

adj.   (-ĭt)

  1. Botany Having rays or raylike parts, as in the flower heads of daisies.

  2. Biology Characterized by radial symmetry.

  3. Surrounded with rays: a radiate head on a coin.


[Latin radiāre, radiāt-, to emit beams, from radius, ray.]
ra'di·a'tive adj.
ra·di·a·tion   (rā'dē-ā'shən)   
n.  

  1. The act or process of radiating: the radiation of heat and light from a fire.

  2. Physics

    1. Emission and propagation and emission of energy in the form of rays or waves.

    2. Energy radiated or transmitted as rays, waves, in the form of particles.

    3. A stream of particles or electromagnetic waves emitted by the atoms and molecules of a radioactive substance as a result of nuclear decay.

    4. The act of exposing or the condition of being exposed to such energy.

    5. The application of such energy, as in medical treatment.

    6. The spread of a group of organisms into new habitats.

    7. Adaptive radiation.

    1. The act of exposing or the condition of being exposed to such energy.

    2. The application of such energy, as in medical treatment.

    3. The spread of a group of organisms into new habitats.

    4. Adaptive radiation.

  4. Anatomy Radial arrangement of parts, as of a group of nerve fibers connecting different areas of the brain.

    1. The spread of a group of organisms into new habitats.

    2. Adaptive radiation.

ra'di·a'tion·al, ra'di·a'tive adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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