holdfast


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holdfast

(hōld′făst′)
n.
1. Any of various devices used to fasten something securely.
2. Biology An organ or structure of attachment, especially the basal, rootlike formation by which certain seaweeds or other algae are attached to a substrate.

holdfast

the basal part of the stripe (stalk) of large seaweeds such as Fucus , Laminaria, attaching the plant to the substrate.