noun Entomology.
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; < Neo-Latin, Latin: yoke

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jugum (ˈdʒuːɡəm)
1.  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 a pair of opposite leaflets
[C19: from Latin, literally: yoke]

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jugum ju·gum (jōō'gəm)
n. pl. ju·gums or ju·ga (-gə)

  1. A ridge or furrow connecting two structures. Also called yoke.

  2. A type of forceps.

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