from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The posterior of the three basal cartilages of the fins of ray-finned fish

from the GNU version of the Collaborative International Dictionary of English

  • n. The posterior of the three principal basal cartilages in the fins of fishes.

from The Century Dictionary and Cyclopedia

  • n. The hindmost of several basal cartilages which the pterygium of a fish, as an elasmobraneh, may present. See pterygium.


Sorry, no etymologies found.


  • The shaded part on the right is the section that persists in the five-fingered hand of the higher Vertebrates. (b the three basal pieces of the fin: mt metapterygium, rudiment of the humerus, ms mesopterygium, p propterygium.) (From Gegenbaur.))

    The Evolution of Man — Volume 2


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