Nostril

n.	1.
	1.	(Anat.) One of the external openings of the nose, which give passage to the air breathed and to secretions from the nose and eyes; one of the anterior nares.
	2.	Perception; insight; acuteness. Methinks a man Of your sagacity and clear nostril should Have made another choice. - B. Jonson.

Noun

1.

nostril - either one of the two external openings to the nasal cavity in the nose Synonyms: anterior naris

air duct, air hole, air passage, air shaft, air tube, airway, antlia, beak, beezer, bill, blowhole, breathing hole, bugle, conk, louver, louverwork, muffle, muzzle, nares, naris, neb, nib, nose, nostrils, nozzle, olfactories, olfactory area, olfactory cell, olfactory nerves, olfactory organ, olfactory pit, pecker, proboscis, rhinarium, rostrum, schnozzle, shaft, smeller, snoot, snout, spilehole, spiracle, touchhole, transom, trunk, vent, ventage, venthole, ventiduct, ventilating shaft, ventilator, wind tunnel