diphycercal

American  

[dif-uh-sur-kuhl] / ˌdɪf əˈsɜr kəl /

adjective

Ichthyology.

1. 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.

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diphycercal British  

/ ˌdɪfɪˈsɜːkəl /

adjective

1. ichthyol of or possessing a symmetrical or pointed tail with the vertebral column extending to the tip, as in primitive fishes

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Etymology

Origin of diphycercal

diphy- double ( diphyodont ) + Greek kérk(os) a tail + -al ¹ ( def. )