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.))