Umbra (disambiguation)

From Wikipedia, the free encyclopedia

The umbra is the darkest part of a shadow.

Umbra may also refer to:

[edit] See also

  • Umbral calculus, a field of mathematics understood primarily to mean the study of Sheffer sequences, including polynomial sequences of binomial type and Appell sequences
  • Top Secret Umbra, a classification for the highest, most sensitive category of communications intelligence
  • Umbra, the name of an exceptionally powerful sword found in the role-playing game The Elder Scrolls IV: Oblivion, along with the name of the wielder (though said wielder implies the sword is possessing her, so it may not actually be her name).