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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 ?
The grade of coronary collateral development was determined according to the Cohen-Rentrop (12) method: grade 0, no filling of any collateral vessels; grade 1, filling of side branches of the artery to be perfused by collateral vessels without visualization of epicardial segment; grade 2, partial filling of the epicardial artery by collateral vessels; and grade 3, as complete filling of epicardial artery by collateral vessel.
It is shown that collateral vessel development shows a good correlation with the severity of myocardial ischemia (18).
1,3,4) Prominent collateral vessels may develop, and the gonadal, ascending lumbar, adrenal, periureteral, and capsular veins are major potential collateral veins that can develop from left renal vein compression or obstruction.
Presence of the metabolic syndrome does not impair coronary collateral vessel formation in patients with documented coronary artery disease.
The other major clinical complication of this condition may present as retroperitoneal hemorrhage as a result of ruptured collateral vessels or mass effect of the paraspinal collateral circulation.
A potential evidence to explain the reason behind the devastating prognosis of coronary artery disease in uraemic patients: renal insufficiency is associated with poor coronary collateral vessel development.
If intravenous contrast is administered, intense enhancement of the basal nuclei can occur--either owing to infarction and breakdown of the blood-brain barrier or from visualisation of the collateral vessels coursing through them.
Our findings raise the potential that new collateral vessels, that can develop in patients with PAD who are physically active, will function effectively to help minimize the consequences of the original vascular obstruction," the Science Daily quoted Dr Ronald Terjung, as saying.
These findings, coupled with increase of blood flow in collateral vessels suggest that the therapy is both safe and effective.
In addition, systemic-to-pulmonary collateral vessels are not as well developed in patients with TOF with pulmonary atresia as they are in patients with PA-VSD.
Either way, Faber hopes they can discover a sequence that could one day be used to predict who is most likely to develop a severe heart attack, stroke, or peripheral limb disease so those individuals can either modify their lifestyle or receive collaterogenic drugs to acquire new and potentially life-saving collateral vessels.