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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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(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).


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

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.

The Dream Encyclopedia, Second Edition © 2009 Visible Ink Press®. All rights reserved.


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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Characteristic imaging appearances of asymmetric narrowing of the internal carotid arteries (especially the supraclinoid portion) with numerous collateral vessels around the brainstem, especially within the ambient and quadrigeminal plate cisterns, are demonstrated with progression.
Indirect revascularization was subdivided into IR "through collaterals" (IRc) and "without collaterals" depending on the presence of collateral vessels to the affected angiosome (pedal arch and distal peroneal branches).
Neovascularization is a process that involves the formation of collateral vessels from preexisting occluded vessels by migration, proliferation, and differentiation of progenitor cells and the interplay between growth factors and cytokines.
Forman et al., "Influence of coronary collateral vessels on myocardial infarct size in humans.
Nitric oxide (NO), which represents the status of endothelial health, plays a major role in collateral vessel development.
Coronary collateral vessels (CC), the remnants of the embryonic arterial system, can develop in the heart as an adaptation to ischemia (1).
(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.
Surgical intervention aids in stroke prevention by creating collateral vessels on the surface of the brain.
The presence of collateral vessels decreased with increasing age, from 47.9% in patients under age 50 to 34.0% in patients aged 70 years and older.
Left superficial femoral artery filling from collateral vessels was Vedat Sabanciogullari et al.