diphycercal

[dif-uh-sur-kuhl]

diph·y·cer·cal

[dif-uh-sur-kuhl]
adjective Ichthyology.
having a tail or caudal fin with the spinal column extending horizontally to the end of the tail, characteristic of lungfish, several other primitive fishes, and the juvenile stage of modern bony fishes.


Origin:
diphy- double (see diphyodont) + cercal
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Diphycercal is always a great word to know.
So is ninnyhammer. Does it mean:
a fool or simpleton; ninny.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
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World English Dictionary
diphycercal (ˌdɪfɪˈsɜːkəl)
 
adj
ichthyol of or possessing a symmetrical or pointed tail with the vertebral column extending to the tip, as in primitive fishes
 
[C19: from Greek diphuēs twofold (from di1 + phuē growth) + kerkos tail]

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