Definition of hydra

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Hydra (n.) Any small fresh-water hydroid of the genus Hydra, usually found attached to sticks, stones, etc., by a basal sucker..

Lern More About Hydra

Accumulator :: Accumulator (n.) An apparatus by means of which energy or power can be stored, such as the cylinder or tank for storing water for hydraulic elevators, the secondary or storage battery used for accumulating the energy of electrical charges, etc..
Hydrated :: Hydrated (a.) Formed into a hydrate; combined with water.
Pectose :: Pectose (n.) An amorphous carbohydrate found in the vegetable kingdom, esp. in unripe fruits. It is associated with cellulose, and is converted into substances of the pectin group..
Zoochlorella :: Zoochlorella (n.) One of the small green granulelike bodies found in the interior of certain stentors, hydras, and other invertebrates..
Water Ram :: Water ram () An hydraulic ram.
Hydramine :: Hydramine (n.) One of a series of artificial, organic bases, usually produced as thick viscous liquids by the action of ammonia on ethylene oxide. They have the properties both of alcohol and amines..
Bud :: Bud (n.) A small protuberance on certain low forms of animals and vegetables which develops into a new organism, either free or attached. See Hydra..
Geyserite :: Geyserite (n.) A loose hydrated form of silica, a variety of opal, deposited in concretionary cauliflowerlike masses, around some hot springs and geysers..
Terpinol :: Terpinol (n.) Any oil substance having a hyacinthine odor, obtained by the action of acids on terpin, and regarded as a related hydrate..
Potash :: Potash (n.) The hydroxide of potassium hydrate, a hard white brittle substance, KOH, having strong caustic and alkaline properties; -- hence called also caustic potash..
Pyrosulphuric :: Pyrosulphuric (a.) Pertaining to, or designating, an acid called also disulphuric acid) obtained by distillation of certain sulphates, as a colorless, thick, oily liquid, H2S2O7 resembling sulphuric acid. It is used in the solution of indigo, in the manufacture of alizarin, and in dehydration..
Mercury :: Mercury (n.) A metallic element mostly obtained by reduction from cinnabar, one of its ores. It is a heavy, opaque, glistening liquid (commonly called quicksilver), and is used in barometers, thermometers, ect. Specific gravity 13.6. Symbol Hg (Hydrargyrum). Atomic weight 199.8. Mercury has a molecule which consists of only one atom. It was named by the alchemists after the god Mercury, and designated by his symbol, /..
Hydrae :: Hydrae (pl. ) of Hydr.
Waterwork :: Waterwork (n.) An hydraulic apparatus, or a system of works or fixtures, by which a supply of water is furnished for useful or ornamental purposes, including dams, sluices, pumps, aqueducts, distributing pipes, fountains, etc.; -- used chiefly in the plural..
Glycide :: Glycide (n.) A colorless liquid, obtained from certain derivatives of glycerin, and regarded as a partially dehydrated glycerin; -- called also glycidic alcohol..
Hydracrylic :: Hydracrylic (a.) Pertaining to, or designating, an isomeric variety of lastic acid that breaks down into acrylic acid and water..
Hydrant :: Hydrant (n.) A discharge pipe with a valve and spout at which water may be drawn from the mains of waterworks; a water plug.
Flume :: Flume (n.) A stream; especially, a passage channel, or conduit for the water that drives a mill wheel; or an artifical channel of water for hydraulic or placer mining; also, a chute for conveying logs or lumber down a declivity..
Gymnochroa :: Gymnochroa (n. pl.) A division of Hydroidea including the hydra. See Hydra.
Hydrosalt :: Hydrosalt (n.) A salt supposed to be formed by a hydracid and a base.
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