- The middle one of several three principal basal cartilages inside fins of fishes.
- The middle one of many three principal basal cartilages within the fins of fishes.
- the center one of several basal cartilages that your pterygium of a fish, as an elasmobranch, may provide, between the propterygium as well as the metapterygium. See pterygium.
Sentence for "mesopterygium"
- The shaded part on the right…
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