| ̷ ̷ ̷ ̷|sərkəl adjective
Etymology: is- + -cercal
1. : having symmetrical upper and lower lobes and a gradually tapering vertebral column — used of the tail fin of a fish
2. : having or relating to an isocercal tail fin
• iso·cer·cy ˈ ̷ ̷ ̷ ̷ˌsərsē, -rkē noun -es