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English Lexicon

Osteichthyan

/ˌɒstiˈɪkθiən/
nounadjectiveCEFR C2 (Proficient)Top #45000 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    A member of the taxonomic superclass Osteichthyes, comprising fish that have a skeleton composed predominantly of bone rather than cartilage.

    "The fossil record shows that osteichthyans first appeared in the late Silurian period."
As adjective
  1. 1

    Relating to or characteristic of bony fish.

    "Biologists compared the fin structures of various osteichthyan species."
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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

Derived from Modern Latin Osteichthyes, coined from Ancient Greek osteon meaning 'bone' and ichthys meaning 'fish'. The taxonomic suffix -an denotes pertaining to or a member of that group, formally established in vertebrate zoology during the late 19th century.

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