SINCE 1828
triphenylene
noun
tri·phenyl·ene
| \trīˈfenᵊlˌēn, -fēn-\
Definition of triphenylene
: 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
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