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1. a passenger or freight-carrying ship, boat, etc.
2. an aircraft, esp an airship
3. Anatomy a tubular structure that transports such body fluids as blood and lymph
4. Botany a tubular element of xylem tissue consisting of a row of cells in which the connecting cell walls have broken down



(also trachea), in plants, a conducting element of xylem that consists of a long hollow tube formed by a single row of cells (vessel members) perforated on their transverse walls. Vessels are characteristic of angiosperms (except for certain Polycarpicae [Trochodendron, drimys] and Liliaceae [lily of the valley, dracena, agave]); they also occur in some ferns (Pleridium), selaginella, Equisetum, and Gneticae (ephedra, Gnetum, Welwitschia).

Vessels may be annular, helical, scalariform, or pitted, depending on the structures of their lateral walls. In annular and helical vessels the secondary membrane resembles rings or twisted ribbons. The vessels arise in the early stages of the development of plant organs and are capable of extension. Scalariform and pitted vessels with larger deposits of secondary membrane and bordered pits in the walls are formed in organs that have finished growing lengthwise. After the lignification of the membranes, the cell protoplasts die and the cavity of the vessel fills with water.

Primitive vessels were characterized by great length (reaching 1.3 mm) and small diameter; the lateral walls were marked by scalariform porosity (tulip tree), and the angular cross section of vessel members had scalariform perforations on sloped transverse walls. Highly specialized vessels are composed of short vessel members that in cross section are rounded and have a wide opening (reaching 0.5 mm in diameter). The vessel members have simple perforations on the transverse walls and small alternate pits on the lateral walls (ash, oak).


What does it mean when you dream about a vessel?

A vessel in a dream may be the container that holds the dreamer’s valuables. The size and the condition of the vessel—e.g., old and tarnished or new and shiny—may indicate if these are established ideals or things newly acquired. Vessels can also be containers of the self.


A water-conducting tube or duct in the xylem.
A container or structural envelope in which materials are processed, treated, or stored; for example, pressure vessels, reactor vessels, agitator vessels, and storage vessels (tanks).
(naval architecture)
Any craft that can carry people or cargo over the surface of the water.
References in periodicals archive ?
A temperature measurement device is installed inside the mixing vessel to measure and continuously monitor the mixture temperature.
Laser-Doppler Anemometry was used for measurements of all velocity components (tangential, radial and axial) at twelve different places inside mixing vessel.
The thermoplastic mixing tank avoid corrosion issues associated with more traditional mild steel mixing vessels.
The resulting mixing action is said to preclude the product degradation and heat build-up associated with ribbon blades, paddles, or plows being forced through material contained in stationary mixing vessels.
long, which penetrates the wall to the factory area where the pinhead-grain oatmeal gravity-feeds through a transition adapter into the mixing vessel.
PROCEDURE: Charge all the water contained in the formulation into the main mixing vessel and begin mixing with propeller agitation.
Inside the body of the impeller there are permanent magnets which are coupled magnetically through the bottom of the mixing vessel to matching magnets in the drive unit.
The motor is mounted above the homogenizing head (turbine-stator), and blending is accomplished by immersing the homogenizing head in a tank or mixing vessel.
The laboratory/pilot plant model includes a motorized lift to raise and lower the agitator from the mixing vessel.
The close blade to bowl design prevents the buildup of material on the tank wall and ensures efficient heat transfer when used with a jacketed mixing vessel.
The headspace design originally inspired by customer demand allows the two vaccines to be mixed directly in the Ingelvac MycoFLEX bottle, thus eliminating the need for an additional mixing vessel.
For phase A, charge mixing vessel with deionized water and begin mixing.