烟酸：同niacin- onychectomy
- onychia
- onychitis
- onychoclasis
- onychocryptosis
- onychodystrophy
- onychogenic
- onychogram
- onychograph
- onychogryphosis
- onychogryposis
- onychoheterotopia
- onycholysis
- onychomadesis
- onychomalacia
- onychomycosis
- onycho-,onych-
- onycho-osteodysplasia
- onychopathic
- onychopathology
- onychopathy
- onychophagia
- onychophagy
- onychoptosis
- onychorrhexis