naphthalene

From naphtha +‎ -ene.

• IPA^(key): /ˈnæfθəliːn/, /ˈnæpθəliːn/

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naphthalene (usually uncountable, plural naphthalenes)

1. A white crystalline hydrocarbon manufactured from coal tar; used in mothballs.
2. (organic chemistry) An aromatic bicyclic hydrocarbon, C₁₀H₈; an acene containing two fused benzene rings.

(2-ring aromatic hydrocarbon):

• acene

(2-ring aromatic hydrocarbon):

• benzene (1-ring acene)
• anthracene (3-ring acene)

• naphthalene on Wikipedia.Wikipedia