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loup·ing ill(lou′pĭng, lō′-)
An infectious neurological disease chiefly of sheep, caused by a flavivirus that is transmitted by the sheep tick. It is characterized by a jerky, hopping gait and often prolonged trembling.
[From Scots loup, to leap, from Middle English lopen; see lope.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
louping ill(ˈlaʊpɪŋ; ˈləʊ-)
(Veterinary Science) a viral disease of sheep causing muscular twitching and partial paralysis: transmitted by the bite of an infected tick (Ixodes ricinus)
[C18 louping, from loup2]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014