An Etymological Dictionary of Astronomy and Astrophysics
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Made accurately parallel or brought into line.

Past participle of → collimate.

A → beam of → photons or → subatomic particles with a narrow → cross section that has little or no spatial spread.

→ collimated; → beam.

A beam of particles in which every particle would have exactly the same direction of travel, thereby the jet moves without → dispersion. Collimated jets of → plasma are associated with → protostars.

→ collimated; → jet.