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At present they are contracted; but the hydra is able to lengthen them out, when they appear as long, thin lines, which are used as the creature's fishing-lines; it is not much larger than a pin's head at present, but it can stretch its body out as it does its lines.— Country Walks of a Naturalist with His Children
Both the blastosphere and gastrula often swim freely by flagella You can hardly have failed to notice how closely the gastrula corresponds to a hydra, and many facts lead us to believe that the still earlier ancestor of the hydra was free swimming, and that the tentacles are a later development correlated with its adult sessile life.— The Whence and the Whither of Man A Brief History of His Origin and Development through Conformity to Environment; Being the Morse Lectures of 1895
"Our government is a hydra-headed octopus that veers and backs depending on the prevailing planetary winds, and that oscillates and flounders and hopes, whatever happens, for the best.— VERBATIM: The Language Quarterly Vol XI No 4
Hydra has been looked up 227 times, favorited 0 times, listed 22 times, and commented on once.

American Heritage Dictionary (1)
Century Dictionary (1)
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