■ noun
1》 a tube or passageway in a building or machine for air, cables, etc.
2》 a vessel in the body for conveying lymph or glandular secretions.
↘a vessel in a plant for conveying water, sap, or air.
■ verb convey through a ~.
Derivatives
~al adjective
~ing noun
Origin
C17 (in the sense 'course' or 'direction'): from L. ~us 'leading, aque~' from ~- , ducere 'lead'.