A variant or archaic term for allergen; a substance capable of triggering an allergic response (rarely used in modern contexts).
An older or alternative formation combining allerg- (from allergy) with the suffix -in (common in chemistry for substances), similar to how 'protein' comes from Greek. Has largely been superseded by the standard term 'allergen.'
Allergin is basically the scientific equivalent of an old-fashioned word—it's a perfectly logical term that medical science created but then abandoned in favor of 'allergen,' leaving it as a quirk in older medical texts!
Complete word intelligence in one call. Free tier — 50 lookups/day.