noun, adj — 2 senses
Etymology From taxonomic name Xenacanthiformes, derived from the genus Xenacanthus [from Ancient Greek ξένος (xénos, “foreign, alien”) + ἄκανθος (ákanthos, “spine”)] + -iformes.
Biology, History, Human sciences, Natural sciences, Paleontology, Sciences Any of the order †Xenacanthiformes of extinct shark-like chondrichthyans.
Etymology From taxonomic name Xenacanthiformes, derived from the genus Xenacanthus [from Ancient Greek ξένος (xénos, “foreign, alien”) + ἄκανθος (ákanthos, “spine”)] + -iformes.
Biology, History, Human sciences, Natural sciences, Paleontology, Sciences Relating or belonging to the order †Xenacanthiformes.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.