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umbra

play
noun um·bra \ˈəm-brə\

Definition of umbra

plural umbras or um·brae play \-(ˌ)brē, -ˌbrī\

  1. 1 :  a shaded area

  2. 2 a :  a conical shadow excluding all light from a given source; specifically :  the conical part of the shadow of a celestial body excluding all light from the primary source b :  the central dark part of a sunspot

um·bral play \-brəl\ adjective


Examples of umbra

  1. <strange noises were coming from the wooded umbra beyond our campfire>

  2. <during a solar eclipse observers located within the umbra experience a complete blocking of the sun by the moon>



Origin of umbra

Latin


First Known Use: 1638



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