Today's Word of the Day means...
vessel ves·sel (věs'əl)
A duct, canal, or other tube that contains or conveys a body fluid such as blood or lymph.
in botany, the most specialized and efficient conducting structure of xylem (fluid-conducting tissues). Characteristic of most flowering plants and absent from most gymnosperms and ferns, vessels are thought to have evolved from tracheids (a primitive form of water-conducting cell) by loss of the end walls.