duct

C1 · Advanced Countable noun Medicine Technical

n. a small tube in a person, animal, or plant that carries a liquid like tears or sap.

n. a bodily passage or vessel, especially one that conveys a secretion such as bile, tears, or lymph.

“When you cry, tears flow from a small duct in the corner of your eye.”

“A blockage in the bile duct can lead to significant digestive complications and requires immediate medical intervention.”

C2 · Proficiency Countable noun Science Technical

n. a layer in the air or sea that traps and carries radio or sound waves.

n. a layer in the atmosphere or ocean that, under specific conditions, confines and propagates radio or sound waves along a restricted path.

“The radio signal travelled much further than usual because of an atmospheric duct.”

“Tropospheric ducting can occasionally allow VHF signals to be received hundreds of miles beyond their normal line-of-sight range.”

C1 · Advanced Technical

v. to send air or gas through a system of pipes.

v. to channel or propagate a substance or wave through a duct or series of ducts.

“The exhaust gases are ducted away from the engine to keep the cabin cool.”

“The design requires the heated air to be ducted directly into the primary combustion chamber to improve thermal efficiency.”