triphenylene
noun
tri·phenyl·ene
trīˈfenᵊlˌēn,
-fēn-
: a crystalline, tetracyclic aromatic hydrocarbon C18H12 present in coal tar and structurally constituted as though three ortho-phenylene radicals were joined to form a central hexagonal ring
Word History
Etymology
International Scientific Vocabulary triphenyl- + -ene