Definition of "bronchus" [bron•chus]

• Either of two main branches of the trachea, leading directly to the lungs. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Main bronchus occlusion for treatment of congenital diaphragmatic hernia in fetal lambs."
• "The right bronchus is shorter, wider, and more nearly vertical than its fellow of the opposite side, and is practically the continuation of the trachea, while the left bronchus might be considered as a branch."
• "Sometimes the cancer cells will be right around the trachea, right around the bronchus, which is some of the cells in the lung and typically that cancer will develop in that area."