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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 ?
An air bubble was injected into the 2% wt CMC solution between the mixing vessel wall and the outer tip (radially-wise) of the impeller blades.
The mixer is self-emptying through an aperture at the bottom of the mixing vessel for convenient discharge.
Sometimes cleaning outside the mixing vessel is needed.
In the closed position, the top of the should be flush with the inner surface of the mixing vessel.
Rather than measuring the absolute temperature of a resin mixture, the system profiles the rate of temperature change in the resin/catalyst mixing vessel to detect an out-of-control reaction before it can cause damage.
Hosepipes are unwieldy, and using buckets to transport water to the mixing vessel is time-consuming and, on occasions, downright dangerous.
This digital, micro-computer controlled device delivers exact, pre-selected quantities of water from a single pipe--straight into the mixing vessel.
The mixer is self-emptying through an aperture at the bottom of the mixing vessel for convenient discharge, whilst exchangeable mixing elements also ensure simple maintenance requirements.
Filling a mixing vessel with hot water has its difficulties.
The new device delivers pre-selected quantifies of water from a single pipe--straight into the mixing vessel.
The tank farm resides directly over the production area and raw materials are delivered through over five miles (8 km) of new stainless steel pipes directly to mixing vessels below.
This allowed the large mixing vessels on the ground floor to be taken out.