What does allergen mean?
Allergen means (medicine) A substance which causes an allergic reaction..
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/ˈælə(ɹ)ˌd͡ʒɛn/ · noun
(medicine) A substance which causes an allergic reaction..
Pollen, dust, and spores are common allergens.
Use allergen when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Allergen means (medicine) A substance which causes an allergic reaction..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Pollen, dust, and spores are common allergens.
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