piriform aperture

== English == === Alternative forms === pyriform aperture === Noun === piriform aperture (plural piriform apertures) (anatomy) The anterior opening of the nasal cavities in the skull. Synonym: anterior nasal aperture ==== Translations ==== === References === “pyriform aperture”, in Merriam-Webster.com Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.