heterocercn.adj.

/ˈhɛtərəʊsəːk/Etymology: < hetero- comb. form + Greek κέρκος tail.
Ichthyology.
A. n.1876 D. Page ix. 184 All the fishes of the palaeozoic periods being heterocercs.
B. adj.1882 (new ed.) Heterocerc.
This entry has not yet been fully updated (first published 1898; most recently modified version published online December 2020).