单词	holdfast
释义	holdfast /ˈhəʊl(d)fɑːst / noun 1A firm grip. 1.1A staple or clamp securing an object to a wall or other surface.Lattice panels, wires, or rough surfaces give tendrils and holdfasts a place to latch onto.... Furthermore, the facts that crowns and holdfasts rarely occur attached but that each is preserved with attached incomplete columns, suggest that crowns were broken from their holdfasts prior to burial. Crowns commonly have some length of column still attached, and holdfasts, less commonly recognized than crowns, also have some length of column attached. 1.2 Biology A stalked organ by which an alga or other simple aquatic plant or animal is attached to a substrate.At the base of the stalk is the holdfast, which cements the alga to the rock and prevents it from being washed away.... Heavy grazing may damage and weaken the holdfasts which anchor the algae. The algae were decapitated, clamped with vice grips at their holdfasts, and secured to the bottom of a unidirectional current tank with an ordinary house brick.
随便看	true left true-life true love true-love flower true-love knot true-lover's knot Trueman, Fred true molar true negative trueness true north truepenny true positive true rib true right true-shaped true to form (or type) true to life truewit true–false ratchet ratchet effect ratchet knife ratchety ratchment

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