Adjacent Words

Water tube definitions

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Webster's 1913 Dictionary

Water tube Wa"ter tube` (Zo["o]l.) One of a system of tubular excretory organs having external openings, found in many invertebrates. They are believed to be analogous in function to the kidneys of vertebrates. See Illust. under Trematodea, and Sporocyst.

Webster's 1913 Dictionary

Water tube Water tube Any tube for passing or holding water; specif., in some steam boilers, a tube in which water circulates and steam is generated.

Webster's 1913 Dictionary

Tube Tube, n. [L. tubus; akin to tuba a trumpet: cf F. tube.] 1. A hollow cylinder, of any material, used for the conveyance of fluids, and for various other purposes; a pipe. 2. A telescope. ``Glazed optic tube.'' --Milton. 3. A vessel in animal bodies or plants, which conveys a fluid or other substance. 4. (Bot.) The narrow, hollow part of a gamopetalous corolla. 5. (Gun.) A priming tube, or friction primer. See under Priming, and Friction. 6. (Steam Boilers) A small pipe forming part of the boiler, containing water and surrounded by flame or hot gases, or else surrounded by water and forming a flue for the gases to pass through. 7. (Zo["o]l.) (a) A more or less cylindrical, and often spiral, case secreted or constructed by many annelids, crustaceans, insects, and other animals, for protection or concealment. See Illust. of Tubeworm. (b) One of the siphons of a bivalve mollusk. Capillary tube, a tube of very fine bore. See Capillary. Fire tube (Steam Boilers), a tube which forms a flue. Tube coral. (Zo["o]l.) Same as Tubipore. Tube foot (Zo["o]l.), one of the ambulacral suckers of an echinoderm. Tube plate, or Tube sheet (Steam Boilers), a flue plate. See under Flue. Tube pouch (Mil.), a pouch containing priming tubes. Tube spinner (Zo["o]l.), any one of various species of spiders that construct tubelike webs. They belong to Tegenaria, Agelena, and allied genera. Water tube (Steam Boilers), a tube containing water and surrounded by flame or hot gases.