Actinopterygian

adj, noun

adj, noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    Any of the ray-finned fish of the taxonomic class Actinopterygii.

    "[…] actinopterygians have 'ray fins' which are supported by a series of narrow cartilaginous or bony rods called radials, while sarcopterygians have 'lobe fins' supported by a single basal bone and with muscles that can modify the posture of the fin."

Adjective
  1. 1
    Of the nature of fish of the class Actinopterygii.

    "Already some years ago it was pointed out that the skeleton of the pelvic fin and girdle of Polypterus is much more actinopterygian than crossopterygian in structure."

Example

More examples

"[…] actinopterygians have 'ray fins' which are supported by a series of narrow cartilaginous or bony rods called radials, while sarcopterygians have 'lobe fins' supported by a single basal bone and with muscles that can modify the posture of the fin."

Etymology

Actinopterygii + -an

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.