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Webster 1913 Edition

Adj.

[Gr.

διφυήσ

double (

δι-

δίσ-

twice +

φύειν

to produce) +

κέρκοσ

tail.]

(Anat.)

Having the tail fin divided into two equal parts by the notochord, or end of the vertebral column; protocercal. See

diphycercal ‎(not comparable)

(zoology) Describing a symmetric tail fin in which the vertebral column extends to the tip