• WordNet 3.6
    • n manroot tropical American prostrate or climbing herbaceous perennial having an enormous starchy root; sometimes held to be source of the sweet potato
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Century Dictionary and Cyclopedia
    • n manroot A morning-glory, Ipomœa leptophylla, found on the dry plains of Colorado and in adjacent regions. It is a plant 2 or 3 feet high, with an immense root having some resemblance in shape and size to a man.
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In news:

The Coast Manroot, a giant tangle of a plant grows from huge, often man-size underground tubers, is also one of Canadas most endangered species.