onyxis

[ oh-nik-sis ]
/ oʊˈnɪk sɪs /

noun Pathology.

an ingrowing of a fingernail or toenail.

Origin of onyxis

< Greek onych- (stem of ónyx) nail (see onyx) + -sis
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019