holdfast

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holdfast

[′hōl‚fast]
(botany)
A suckerlike base which attaches the thallus of certain algae to the support.
A disklike terminal structure on the tendrils of various plants used for attachment to a flat surface.
(invertebrate zoology)
An organ by which parasites such as tapeworms attach themselves to the host.

holdfast

A device for securing anything in its place, as a hook, bolt, spike, etc.