siphuncle

siphuncle
Siphon Si"phon, n. [F. siphon, L. sipho, -onis, fr. Gr. ??? a siphon, tube, pipe.] 1. A device, consisting of a pipe or tube bent so as to form two branches or legs of unequal length, by which a liquid can be transferred to a lower level, as from one vessel to another, over an intermediate elevation, by the action of the pressure of the atmosphere in forcing the liquid up the shorter branch of the pipe immersed in it, while the continued excess of weight of the liquid in the longer branch (when once filled) causes a continuous flow. The flow takes place only when the discharging extremity of the pipe ia lower than the higher liquid surface, and when no part of the pipe is higher above the surface than the same liquid will rise by atmospheric pressure; that is, about 33 feet for water, and 30 inches for mercury, near the sea level. [1913 Webster]

2. (Zo["o]l.) (a) One of the tubes or folds of the mantle border of a bivalve or gastropod mollusk by which water is conducted into the gill cavity. See Illust. under {Mya}, and {Lamellibranchiata}. (b) The anterior prolongation of the margin of any gastropod shell for the protection of the soft siphon. (c) The tubular organ through which water is ejected from the gill cavity of a cephaloid. It serves as a locomotive organ, by guiding and confining the jet of water. Called also {siphuncle}. See Illust. under {Loligo}, and {Dibranchiata}. (d) The siphuncle of a cephalopod shell. (e) The sucking proboscis of certain parasitic insects and crustaceans. (f) A sproutlike prolongation in front of the mouth of many gephyreans. (g) A tubular organ connected both with the esophagus and the intestine of certain sea urchins and annelids. [1913 Webster]

3. A siphon bottle. [1913 Webster]

{Inverted siphon}, a tube bent like a siphon, but having the branches turned upward; specifically (Hydraulic Engineering), a pipe for conducting water beneath a depressed place, as from one hill to another across an intervening valley, following the depression of the ground.

{Siphon barometer}. See under {Barometer}.

{Siphon bottle}, a bottle for holding a["e]rated water, which is driven out through a bent tube in the neck by the gas within the bottle when a valve in the tube is opened; -- called also {gazogene}, and {siphoid}.

{Siphon condenser}, a condenser for a steam engine, in which the vacuum is maintained by the downward flow of water through a vertical pipe of great height.

{Siphon cup}, a cup with a siphon attached for carrying off any liquid in it; specifically (Mach.), an oil cup in which oil is carried over the edge of a tube in a cotton wick, and so reaches the surface to be lubricated.

{Siphon gauge}. See under {Gauge}.

{Siphon pump}, a jet pump. See under {Jet}, n. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Siphuncle — Si phun cle, n. [L. siphunculus, sipunculus, dim. of sipho. See {Siphon}.] (Zo[ o]l.) The tube which runs through the partitions of chambered cephalopod shells. [1913 Webster] …   The Collaborative International Dictionary of English

  • Siphuncle — The siphuncle is a strand of tissue passing longitudinally through the shell of a cephalopod mollusk. Only cephalopods with chambered shells have siphuncles, such as the extinct ammonites and belemnites, and the living nautiluses, cuttlefish, and …   Wikipedia

  • siphuncle — ˈsīˌfəŋkel noun ( s) Etymology: New Latin siphunculus, from Latin, little pipe, diminutive of sipho, siphon siphon more at siphon 1. a. : a membranous tubular extension of the mantle which runs through the partitions of the chambers to the apex… …   Useful english dictionary

  • siphuncle — n. [Gr. dim. siphon, tube] 1. (ARTHROPODA: Insecta) see cornicle. 2. (MOLLUSCA: Cephalopoda) A tubular vascular extension borne at the apex of the visceral hump, that runs through the outer chambers of the nautiloid shell and secretes gas into… …   Dictionary of invertebrate zoology

  • siphuncle — siphuncular, siphunculate /suy fung kyeuh lit/, siphunculated /suy fung kyeuh lay tid/, adj. /suy fung keuhl/, n. 1. (in a nautilus) the connecting tube that passes from the end of the body through all of the septa to the innermost chamber. 2.… …   Universalium

  • siphuncle — noun A strand of tissue passing longitudinally through the shell of a cephalopod mollusk, used primarily in emptying water from new chambers as the shell grows …   Wiktionary

  • siphuncle — si·phun·cle …   English syllables

  • Ellesmerocerida — Taxobox name = Ellesmerocerida fossil range = U Cambrian Ordovician regnum = Animalia phylum = Mollusca classis = Cephalopoda subclassis = Nautiloidea ordo = Ellesmerocerida ordo authority = Flower 1950 The Ellesmerocerida comprise early… …   Wikipedia

  • Discosorida — Temporal range …   Wikipedia

  • Nautilus — For other uses, see Nautilus (disambiguation). Nautilus Temporal range: Triassic–Present[1] …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”