1 a firm grasp.
2 a staple or clamp securing an object to a wall etc.
3 the attachment-organ of an alga etc.

Useful english dictionary. 2012.

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  • Holdfast — Hold fast , n. 1. Something used to secure and hold in place something else, as a long flat headed nail, a catch a hook, a clinch, a clamp, etc.; hence, a support. His holdfast was gone. Bp. Montagu. [1913 Webster] 2. (Bot.) A conical or… …   The Collaborative International Dictionary of English

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  • holdfast — [hōld′fast΄] n. 1. the act of holding fast 2. any of various devices that hold something else in place; hook, nail, clamp, etc. 3. Bot. a part of certain rootless plants, as some algae, used to attach the plant to a surface 4. Zool. an organ of a …   English World dictionary

  • Holdfast — A holdfast is a root like structure that anchors aquatic sessile organisms, such as seaweed, other sessile algae, stalked crinoids, colonial cnidarians, and sponges, to the substrate. [cite book |author=D. N. Thomas |year=2002 |title=Seaweeds… …   Wikipedia

  • holdfast — hold·fast hōl(d) .fast n an organ by which a parasitic animal (as a tapeworm) attaches itself to its host * * * hold·fast (hōldґfast) a mass of material secreted by a cell or organism by which it is attached to a substrate or surface; called …   Medical dictionary

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  • Holdfast Bay — is a small bay in Gulf St Vincent, next to Adelaide, South Australia. Along its shores lie the City of Holdfast Bay and the popular beach side suburb of Glenelg.European settlementThe bay was named by Colonel William Light, South Australian… …   Wikipedia

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