The openings of the nasal cavity (Morris 1992).
a nostril or external opening to the nasal passages
any of the openings to the nasal cavities that allow air to flow through the cavities to the pharynx
in palaeontology, the external opening of the nasal cavity; in other disciplines, the soft-tissue structure around the external opening of the nasal cavity (i.e. in humans, the nostril)
Latin = nostril, plural - nares.