tropylium

Noun

 * 1)  The delocalized carbenium ion cycloheptatrienylium, C$7$H$7$$+$, derived from cycloheptatriene, or any of its derivatives.

Translations

 * Chinese:
 * Cantonese: 䓬
 * Mandarin:
 * Japanese: トロピリウム
 * Korean: 트로필륨