pennatula definition

  • noun:
    • anybody of numerous types of Pennatula, Pteroides, and allied genera of Alcyonaria, having a featherlike form; a sea-pen. The zooids tend to be situated along one side of the medial side branches.
    • the conventional genus of Pennatulid√¶ the sea-pens. P. phosphorea is a European species. See cut-under Alcyonaria.
    • [lowercase] A polyp of this genus Pennatula; a sea-pen.
    • type genus associated with family members Pennatulidae: water pens

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