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visna

[vis-nuh]
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noun
  1. Veterinary Pathology. a disease of sheep, caused by a quickly mutating lentivirus, and affecting the central nervous system.
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Origin of visna

First recorded in 1955–60, visna is from the Old Norse word visna to wither
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018