Relating to, located near, or resembling a tail; in anatomy, referring to the rear or lower end of an organism.
From Latin cauda (tail) plus the adjectival suffix -al (denoting relation or possession). This became the standard anatomical adjective for describing tail-related or posterior structures.
When your anatomy textbook says 'caudal fin' instead of 'tail fin,' it's technically more precise—the caudal fin is literally tail-shaped and positioned where a tail would be, which is why Latin keeps scientific language crystal-clear.
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