The condition or quality of having a gephyrocercal tail structure in fish.
From the same Greek roots as gephyrocercal ('gephyra' + 'kerkos'), with '-cy' suffix indicating a state or condition. This technical term categorizes a specific type of fish tail morphology.
Ancient scientists had to invent whole new words just to describe tiny differences in fish anatomy! This word is like the zoological equivalent of early explorers naming every new animal they found.
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