noun
a term used in biology to refer to fine, hair-like structures found in some organisms
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Actinotrichia are specialized collagen fibers found in the fins of some fish species.
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Did you know that actinotrichia are like the support beams of a fish's fin?
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Those actinotrichia thingies in the fish fins are pretty cool, huh?
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The actinotrichia in the fish fins act like a strong foundation, allowing them to glide through the water effortlessly.