The story
From circum- + coronene. From the coronene molecule's ring of fused benzene rings being completely enclosed around its circumference by another outer ring of fused benzene rings.
Etymology from Wiktionary, CC BY-SA 4.0.
circumcoronene
Today it means: An aromatic hexagonal flat sheet molecule composed of fused benzene rings, 3 benzene rings to a side, 19 rings to a sheet. An outer ring of 12 fused benzene rings surrounds the core coronene. Circumcoronene has the molecular formula C₅₄H₁₈ Full definition →