Century Dictionary and Cyclopedia
- In ichthyology having asymmetrical dorsal and anal fin-spines, alternately broader on one side than on the other; not homacanth.
- adj. zoology Having the spines of the dorsal fin asymmetrical, or thickened alternately on the right and left sides.
GNU Webster's 1913
- adj. (Zoöl.) Having the spines of the dorsal fin unsymmetrical, or thickened alternately on the right and left sides.
- hetero- + Ancient Greek a spine. (Wiktionary)
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