from The Century Dictionary.
- noun One of the homogeneous hair-like fibers which represent the rays in the fin-folds of the embryos of fishes, and which subsequently fuse to form the membranous basis of the permanent rays of the adult fish.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun zoology Any of a group of hairlike
fibresin the finfolds of fish larvaethat develop into fin rays
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