Dictionary > Siphon


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.
2. (Science: zoology) 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. The anterior prolongation of the margin of any gastropod shell for the protection of the soft siphon.
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.
The siphuncle of a cephalop
od shell.
The sucking proboscis of certain parasitic insects and crustaceans.
A sproutlike prolongation in front of the mouth of many gephyreans.
A tubular organ connected both with the oesophagus and the intestine of certain sea urchins and annelids.
3. A siphon bottle.
(Science: physics) inverted siphon, a tube bent like a siphon, but having the branches turned upward; specifically, 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 Gauge. Siphon pump, a jet pump. See Jet.
Origin: F. Siphon, L. Sipho, -onis, fr. Gr. A siphon, tube, pipe.
(Science: chemistry) To convey, or draw off, by means of a siphon, as a liquid from one vessel to another at a lower level.

You will also like...

Biological Energy
ATP & ADP – Biological Energy

ATP is the energy source that is typically used by an organism in its daily activities. The name is based on its structu..

Still Water Animals
Still Water Animals

Animals living in aquatic habitats have diversified and evolved through time. They eventually occupy ecological niches a..

Human Reproduction
Human Reproduction

Humans are capable of only one mode of reproduction, i.e. sexual reproduction. Haploid sex cells (gametes) are produced ..

Structural depiction of catalase, an enzyme
Protein Activity and Cellular Metabolism

Proteins have a crucial role in various biological activities. Get to know how proteins are able to perform as enzymes, ..

Neurology of Illusions
Neurology of Illusions

Illusions are the perceptions and sensory data obtained from situations in which human error prevents us from seeing the..

Water Cycle
The Water Cycle

The water cycle (also referred to as the hydrological cycle) is a system of continuous transfer of water from the air, s..

Related Articles...

No related articles found

See all Related Topics