jugum

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ju·gum

 (jo͞o′gəm)
n. pl. ju·ga (-gə) or ju·gums
A yokelike structure in certain insects that joins the forewings to the hind wings, keeping them together during flight.

[Latin iugum, yoke; see yeug- in Indo-European roots.]
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.

jugum

(ˈdʒuːɡəm)
n
1. (Zoology) a small process at the base of each forewing in certain insects by which the forewings are united to the hindwings during flight
2. (Botany) botany a pair of opposite leaflets
[C19: from Latin, literally: yoke]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ju•gum

(ˈdʒu gəm)

n.
the posterior basal area or lobe in the forewing of certain insects, sometimes serving to couple the forewings and hind wings in flight.
[1855–60; < New Latin, Latin: yoke]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.