Pediatrics or Paediatrics - US and UK spelling

It's not surprising that spelling of medical terms is confusing. Pediatrics is the US spelling, while Paediatrics is the British (UK) spelling!

In the answers to the questions on baby and toddler health, I use the US spelling for convenience. But in my usual practice, I usually use UK English so I say paediatrics and I call myself a paediatrician.

Most of the time, it's easy to figure out what the alternative is, but I have included this page on my site, so it's easy for you.

So, if you see a word on the site and want to know the UK equivalent, go to the US to UK Spelling section.

If you use UK spelling and want to check how I would have spelt the word on this site, go to the UK to US Spelling section.


US to UK spelling.

  • anemia - anaemia
  • behavior - behaviour
  • celiac disease - coeliac disease
  • diarrhea - diarrhoea
  • esophagitis - oesophagitis
  • esophagus - oesophagus
  • fetal - foetal
  • gastro-esophageal reflux - gastro-oesophageal reflux
  • gerd (gastro-esophageal reflux disease) - gord (gastro-oesophageal reflux disease)
  • hemangioma - haemangioma
  • hemoglobin - haemoglobin
  • hydrocele - hydrocoele
  • immunization - immunisation
  • leukemia - leukaemia
  • mucus - mucous
  • nevus - naevus
  • pediatrician - paediatrician
  • pediatrics - paediatrics
  • septicemia - septicaemia
  • thalassemia - thalassaemia
  • thrombocytopenia - thrombocytopaenia
  • tumor - tumour

UK to US spelling.

  • anaemia - anemia
  • behaviour - behavior
  • coeliac disease - celiac disease
  • diarrhoea - diarrhea
  • foetal - fetal
  • gastro-oesophageal reflux - gastro-esophageal reflux
  • gord (gastro-oesophageal reflux disease) - gerd (gastro-esophageal reflux disease)
  • haemangioma - hemangioma
  • haemoglobin - hemoglobin
  • hydrocoele - hydrocele
  • immunisation - immunization
  • leukaemia - leukemia
  • mucous - mucus
  • naevus - nevus
  • oesophagitis - esophagitis
  • oesophagus - esophagus
  • paediatrician - pediatrician
  • paediatrics - pediatrics
  • septicaemia - septicemia
  • thalassaemia - thalassemia
  • thrombocytopaenia - thrombocytopenia
  • tumour - tumor
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Last reviewed 20 May 2011

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Dr Maud MD

Dr Maud MD (MBChB, FRACP, FRCPCH), a specialist pediatrician, provides health information and medical advice for parents of babies and toddlers. Read more about Dr Maud.



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