What term describes an irritant that shows delayed effects on the lungs?

The term that describes an irritant showing delayed effects on the lungs is "chronic irritant." Chronic irritants are substances that can cause long-term adverse effects, particularly after repeated or prolonged exposures. Unlike acute irritants, which result in immediate reactions, chronic irritants can lead to progressive damage over time, often manifesting symptoms long after initial exposure. This delayed response can make it challenging to identify the cause of the respiratory issues, as the relationship between exposure and health effects may not be immediately apparent.

Recognizing chronic irritants is crucial for workplace safety and environmental health, as ongoing exposure can lead to serious conditions, including chronic respiratory diseases.