A chemical compound related to acridine; a tricyclic aromatic organic compound.
From acrid + -an (a suffix used in chemistry for organic compounds). Acridan is derived from acridine, a base chemical structure with three fused rings.
Chemists use acridan in fluorescent dyes and medicines—it's a molecule shaped like three stacked hexagons that glows under UV light, which is why your highlighter pen works!
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