/ˈjo͞ogəm/
Noun, pl. juga or jugums
(Botany)
1. A connecting ridge or projection (Google Dictionary); one of the ridges commonly found on the fruit of umbelliferous plants (wiktionary.org).
2. A pair of opposite leaflets of a pinnate plant (wiktionary.org).
(Zoology)
1. A lobe on the forewing of some moths which interlocks with the hind wing in flight (Google Dictionary).
2. A yokelike structure in certain insects that joins the forewings to the hind wings, keeping them together during flight. (thefreedictionary.com)
Word origin: Latin word, “yoke, ridge”