umbra - Dictionary definition and pronunciation - Yahoo! Education
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umˇbra  audio  (mbr) KEY 

NOUN:
pl. umˇbras or umˇbrae  (-br) KEY 
  1. A dark area, especially the blackest part of a shadow from which all light is cut off. See Synonyms at shade.
  2. Astronomy
    1. The completely dark portion of the shadow cast by the earth, moon, or other body during an eclipse.
    2. The darkest region of a sunspot.
ETYMOLOGY:
Latin, shadow

OTHER FORMS:
umbral(Adjective)


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