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- DictionaryPe·num·bra/pəˈnəmbrə/
noun
- 1. the partially shaded outer region of the shadow cast by an opaque object.
1. a. : a space of partial illumination (as in an eclipse) between the perfect shadow on all sides and the full light. b. : a shaded region surrounding the dark central portion of a sunspot. 2. : a surrounding or adjoining region in which something exists in a lesser degree : fringe.
Penumbra definition: the partial or imperfect shadow outside the complete shadow of an opaque body, as a planet, where the light from the source of illumination is only partly cut off.. See examples of PENUMBRA used in a sentence.
PENUMBRA definition: 1. a part of a shadow in which only some of the light is blocked, used especially about a shadow…. Learn more.
In a lunar eclipse, the edge of the earth's shadow — the part that isn't fully dark — is its penumbra. Sun spots also have a penumbra, the outer edge that's not quite as dark as the center. The word comes from the Latin root umbra , which means "shadow."
a. the partial or imperfect shadow outside the complete shadow of an opaque body, as a planet, where the light from the source of illumination is only partly cut off. b. the grayish marginal portion of a sunspot. 2. a shadowy, indefinite, or marginal area.
Definition of penumbra noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
Jun 2, 2024 · penumbra (plural penumbras or penumbrae or (obsolete) penumbræ) A partially shaded area around the edges of a shadow, especially an eclipse . ( astronomy) A region around the edge of a sunspot, darker than the sun's surface but lighter than the middle of the sunspot. ( figuratively) An area of uncertainty or intermediacy between two mutually ...
1. a fringe region of half shadow resulting from the partial obstruction of light by an opaque object. 2. astronomy. the lighter and outer region of a sunspot. 3. painting. the point or area in which light and shade blend. Compare umbra.
Penumbra definition: A partial shadow, as in an eclipse, between regions of complete shadow and complete illumination.
A complete guide to the word "PENUMBRA": definitions, pronunciations, synonyms, grammar insights, collocations, examples, and translations.
