noun, feminine/ɔ.ni.kɔ.mi.koz/plural: onychomycoses
onychomycose is feminine in French.
onychomycosis (nail fungus)
Synonyms: champignons aux ongles, f mycose de l'ongle, mycose des ongles, m champignon de l'ongle, champignons des ongles
From onycho- + mycose.