• Webster's Revised Unabridged Dictionary
    • n Spirulate (Zoöl) Having the color spots, or structural parts, arranged spirally.
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Century Dictionary and Cyclopedia
    • spirulate Spiral in form, or in disposition of parts; spirally arranged: said of structures, markings, etc.
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Chambers's Twentieth Century Dictionary
    • Spirulate spiral in form or arrangement
    • Spirulate . See under Spire.
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