Heteracanth

• (a.) Having the spines of the dorsal fin unsymmetrical, or thickened alternately on the right and left sides.
Found on http://thinkexist.com/dictionary/meaning/heteracanth/

Heteracanth

Het'er·a·canth adjective [ Hetero- + Greek ... a spine.] (Zoology) Having the spines of the dorsal fin unsymmetrical, or thickened alternately on the right and left sides.
Found on http://www.encyclo.co.uk/webster/H/39

heteracanth

heteracanth Having the spines of the dorsal and anal fins alternately broader on one side than the other.
Found on http://www.wordinfo.info/words/index/info/view_unit/2790/
No exact match found