Source : Webster's Revised Unabridged Dictionary (1913)
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.
Source : WordNet®
tube foot
n : tentacular tubular process of most echinoderms (starfish and
sea urchins and holothurians) having a sucker at the end
and used for e.g. locomotion and respiration