Abnormal nostril morphology Narrow naris 2009-05-10T10:35:51Z Slender, slit-like aperture of the nostril. Naris, narrow Thin nares Slit-like nostrils Collapsed nostrils UMLS:C4280390 HP:0009933 UMLS:C0426439 Thin nostrils Narrow nostrils Small nostrils UMLS:C0426436 UMLS:C1849366 SNOMEDCT_US:249336003 Narrow nares SNOMEDCT_US:249339005 Naris, slit-like