Many British words tend to retain the ligatures 'oe' and 'ae' in words of Greek or Latin origin. Examples: diarrhoea (American: diarrhea), orthopaedic (orthopedic), oesophagus (esophagus). | Many British words tend to retain the ligatures 'oe' and 'ae' in words of Greek or Latin origin. Examples: diarrhoea (American: diarrhea), orthopaedic (orthopedic), oesophagus (esophagus). |