Etymology
Today it means: The sesquiterpene (1aR,4R,7R,7bS)-1,1,4,7-tetramethyl-1a,2,3,4,5,6,7,7b-octahydrocyclopropa[e]azulene Full definition →
From iso- + ledene.
Etymology from Wiktionary, CC BY-SA 4.0.