O

• Objectives - goals to be achieved, desired outcomes or results

• Oedema - swelling of the tissues due to excess fluid

• Ohm - unit of electrical resistance

• Olfactory - pertaining to smell

• Onychatrophia - wasting away of the nail plate until it comes away completely, caused by injury or disease

• Onychauxis - abnormal thickening of the nail plate

• Onychogryposis - claw shaped nail, it has a thickened nail plate

• Onycholysis - separation of the nail bed from the nail plate

• Onychophagy - bitten nails

• Onychophyma - swelling or hypertrophy of the nails

• Onychorrhexis - longitudinal splitting and peeling of the nails, may be caused by overusing strong chemicals

• Outcomes – results

• Overheads - the operating expenses of running a business exclusive of labour and materials