Definition of selachian in English:

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Pronunciation: /sɪˈleɪkɪən/


An elasmobranch fish of a group that comprises the sharks and dogfishes.
  • The former group Selachii, subclass Elasmobranchii: now treated as one, two, or three superorders.
Example sentences
  • Those produced by the hypochordal lobe of the caudal fin of selachians and early bony fishes have been studied in detail.
  • Fish included many elasmobranchs as well as osteichthyes such as palaeoniscoids, dipnoi, selachians, and crossopterygians, together with the ancient acanthodians.
  • Lack of neural spine is consistent with selachians (a group of vertebrates which includes sharks and rays).


Relating to the selachians.
Example sentences
  • The A. alatus specimens were collected from tuffaceous fine-grained sandstones that overlay the very fossiliferous yellowish tuffs containing abundant remains of bivalves, echinoids, whale vertebrae, and selachian teeth.


Mid 19th century: from modern Latin Selachii (from Greek selakhos 'shark') + -an.

For editors and proofreaders

Line breaks: se¦lach|ian

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