Webster’s Revised Unabridged Dictionary · 1913
Heteracanth
Het′er·a·canth (hĕt′ẽr·ȧ·kănth), a. [Hetero- + Gr. ἄκανθα a spine.] (Zoöl.) Having the spines of the dorsal fin unsymmetrical, or thickened alternately on the right and left sides.
Webster’s Revised Unabridged Dictionary · 1913
Het′er·a·canth (hĕt′ẽr·ȧ·kănth), a. [Hetero- + Gr. ἄκανθα a spine.] (Zoöl.) Having the spines of the dorsal fin unsymmetrical, or thickened alternately on the right and left sides.