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radiate (v.)

1610s, "issue or spread in all directions from a point in rays or straight lines," from Latin radiatus, past participle of radiare "to beam, shine, gleam; make beaming," from radius "beam of light; spoke of a wheel" (see radius). Meaning "be radiant, give off rays (of light or heat)" is from 1640s. Related: Radiated; radiates; radiating.

radiate (adj.)

"having rays, furnished with rays or ray-like parts, shining," 1660s, from Latin radiatus, past participle of radiare "to beam, shine, gleam; make beaming," from radius "beam of light; spoke of a wheel" (see radius).

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Definitions of radiate from WordNet
1
radiate (v.)
send out rays or waves;
The sun radiates heat
radiate (v.)
send out real or metaphoric rays;
She radiates happiness
radiate (v.)
extend or spread outward from a center or focus or inward towards a center;
This plants radiate spines in all directions
spokes radiate from the hub of the wheel
Synonyms: ray
radiate (v.)
have a complexion with a strong bright color, such as red or pink;
Synonyms: glow / beam / shine
radiate (v.)
cause to be seen by emitting light as if in rays;
radiate (v.)
experience a feeling of well-being or happiness, as from good health or an intense emotion;
Her face radiated with happiness
Synonyms: glow / beam / shine
radiate (v.)
issue or emerge in rays or waves;
Heat radiated from the metal box
radiate (v.)
spread into new habitats and produce variety or variegate;
Synonyms: diversify
2
radiate (adj.)
arranged like rays or radii; radiating from a common center;
Synonyms: radial / stellate
radiate (adj.)
having rays or ray-like parts as in the flower heads of daisies;
From wordnet.princeton.edu