umbrae

Variant of umbra

umbra definition

um·bra (um′brə)

noun pl. umbrae -·brae (-brē) or umbras -·bras

  1. shade or a shadow
  2. the dark central cone of shadow projecting from a planet or satellite on the side opposite the sun
  3. the dark central part of a sunspot
  4. Rare a phantom, or ghost
  5. Physics a perfect or complete shadow, in which no direct light is received from the source of illumination

Etymology: L, a shade, shadow

Related Forms:

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

Comments
Improve this definition.
Do you have more to add? Share your linguistic knowledge or observation.
/Register to save your comments.