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Another word for umbra

Noun

  1. Comparative darkness that results from the blocking of light rays

    2. See also:

    light

© Roget’s II: The New Thesaurus Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.

Sentence Examples

  • The notions of the penumbra and umbra are important in considering eclipses (q.v.).

  • The umbra in the former case becomes the fully illuminated portion, and vice versa.

  • Each spot shows with more or less completeness a ring-shaped penumbra enclosing a darker umbra; the umbra, which looks black beside' the photosphere, is actually about as brilliant as limelight.

  • The umbra of a spot is generally not tormented by rapid line-of-sight motions; where any motion has been found G.

  • the true shadow or umbra, and also a definite boundary of the parts wholly illuminated.

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Words that mention umbra in the Dictionary

Words near umbra in the Thesaurus