Wiktionary
noseplug
n. A plug placed in the nose, usually to prevent accidental inhalation of water when swimming
Usage examples of "noseplug".
They went on, moving at the same easy trot, breathing through the noseplugs and fighting the need to gasp in more air through the mouth.
Sitor Ananta objects, adjusting his noseplug to admit more vasopressin to his inhalant, sharpening his verbal ability.