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from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Of, or pertaining to, the penumbra.

from The Century Dictionary and Cyclopedia

  • Pertaining to or resembling a penumbra.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. of or pertaining to the region of partial shadow around an umbra


penumbra +‎ -al (Wiktionary)



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