ventral fin

American  

noun

1. pelvic fin.

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ventral fin British  

noun

1. another name for pelvic fin

2. any unpaired median fin situated on the undersurface of fishes and some other aquatic vertebrates

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Etymology

Origin of ventral fin

First recorded in 1745–55

Example Sentences

V Ventral fin: p pelvis, ax fin-axis, ss single row of fin-rays, bs additional rays, sch scales, cop penis.

From The Evolution of Man — Volume 2 by Haeckel, Ernst Heinrich Philipp August

Pectoral fin, fifteen rays, first very short: Ventral fin, five rays, one very strong, short.

From Narrative of a Survey of the Intertropical and Western Coasts of Australia Performed between the years 1818 and 1822 — Volume 2 by King, Phillip Parker