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n.1.(Zool.) A chitinous structure which supports the gill in some invertebrates.
References in periodicals archive ?
But these bat tongues are extremely rapid because the vascular system that erects the hair-like papillae is embedded within a muscular hydrostat, which is a fancy term for muscular, constant-volume structures like tongues, elephant trunks and squid tentacles.
And he notes that the muscular hydrostat idea has already reshaped physiologists' thinking about how the human heart expands after contraction.
Guided in part by nature's muscular hydrostat examples, Wilson expects that such complaint robot arms will be more robust and will be able to operate in tighter, more awkward work spaces than their conventional, rigidlimbed counterparts.