Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • intransitive v. To send out rays or waves.
  • intransitive v. To issue or emerge in rays or waves: Heat radiated from the stove.
  • intransitive v. To extend in straight lines from or toward a center; diverge or converge like rays: Spokes radiate from a wheel hub.
  • intransitive v. Ecology To spread into new habitats and thereby diverge or diversify. Used of a group of organisms.
  • transitive v. To emit (light, for example) in or as if in rays.
  • transitive v. To send or spread out from or as if from a center: a cactus that radiates spines.
  • transitive v. To irradiate or illuminate (an object).
  • transitive v. To manifest in a glowing manner: a leader who radiates confidence.
  • adj. Botany Having rays or raylike parts, as in the flower heads of daisies.
  • adj. Biology Characterized by radial symmetry.
  • adj. Surrounded with rays: a radiate head on a coin.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. To extend, send or spread out from a center like radii.
  • v. To emit rays or waves.
  • v. To come out or proceed in rays or waves.
  • v. To illuminate.
  • v. To expose to ionizing radiation, such as by radiography.
  • v. To manifest oneself in a glowing manner.
  • v. to spread into new habitats, migrate.
  • adj. radiating from a center.
  • adj. surrounded by rays, such as the head of a saint in a religious picture.
  • adj. having parts radiating from the center, such as the petals in many flowers.
  • adj. having radial symmetry, such as a seastar.
  • n. One of the Radiata.

from the GNU version of the Collaborative International Dictionary of English

  • intransitive v. To emit rays; to be radiant; to shine.
  • intransitive v. To proceed in direct lines from a point or surface; to issue in rays, as light or heat.
  • transitive v. To emit or send out in direct lines from a point or points.
  • transitive v. To enlighten; to illuminate; to shed light or brightness on; to irradiate.
  • adj. Having rays or parts diverging from a center; radiated.
  • adj. Having in a capitulum large ray florets which are unlike the disk florets, as in the aster, daisy, etc.
  • adj. Belonging to the Radiata.
  • n. One of the Radiata.

from The Century Dictionary and Cyclopedia

  • To issue and proceed in rays or straight lines from a point; spread directly outward from a center or nucleus, as the spokes of a wheel, heat and light, etc.
  • To emit rays; be radiant: as, a radiating body.
  • To spread in all directions from a central source or cause; proceed outward as from a focus to all accessible points.
  • To emit or send out in direct lines, as from a point or focus; hence, to cause to proceed or diverge in all directions, as from a source or cause; communicate by direct emanation: as, the sun radiates heat and light.
  • To furnish with rays; cause to have or to consist of rays; make radial.
  • Having a ray, rays, or ray-like parts; having lines or projections proceeding from a common center or surface; rayed: as, a radiate animal (a member of the Radiata); a radiate mineral (one with rayed crystals or fibers); a radiate flower-head.
  • Constituting a ray or rays; proceeding or extending outward from a center or focus; radiating: as, the radiate fibers of some minerals and plants; the radiate petals of a flower or florets of a head.
  • In numismatic and similar descriptions, represented with rays proceeding from it, as a head or bust: as, the head of the Emperor Caracalla, radiate; the head of Helios (the sun-god), radiate.
  • n. A ray-like projection; a ray.
  • n. A member of the Radiata, in any sense.
  • To be directed, as rays, toward a common center: as, “spokes radiating to an axle.”

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • v. send out rays or waves
  • v. issue or emerge in rays or waves
  • v. extend or spread outward from a center or focus or inward towards a center
  • v. spread into new habitats and produce variety or variegate
  • v. cause to be seen by emitting light as if in rays
  • adj. arranged like rays or radii; radiating from a common center
  • v. send out real or metaphoric rays
  • v. experience a feeling of well-being or happiness, as from good health or an intense emotion
  • adj. having rays or ray-like parts as in the flower heads of daisies
  • v. have a complexion with a strong bright color, such as red or pink

Etymologies

Latin radiāre, radiāt-, to emit beams, from radius, ray.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin radiatus, past participle of radiare ("to radiate, furnish with spokes, give out rays, radiate, shine"), from radius ("a spoke, ray"). (Wiktionary)

Examples

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