'allergology' originates from Greek, specifically the word 'allergia,' where 'allos' meant 'other' and 'ergon' meant 'work.'

'allergia' transformed into the French word 'allergie,' and eventually became the modern English word 'allergy' through Middle English.

Initially, it meant 'reaction to foreign substances,' but over time it evolved into its current meaning of 'study of allergies.'