Final answer:
The correct spelling for the condition of dilation of the bronchus is bronchodilation, which is crucial for increasing air flow to the lungs.
Step-by-step explanation:
The correct spelling of the word that means condition of dilation of the bronchus is bronchodilation.
Bronchodilation refers to the increase in the size of the bronchiole due to contraction of the muscular wall. It is the opposite of bronchoconstriction, which is a decrease in the size of the bronchiole due to contraction of the muscular wall. Bronchodilation aids in increasing air flow to the lungs, which is particularly important in conditions such as asthma, where inflammation and constriction of the airways can make breathing difficult.