Glossary Terms ALLERGEN October 4, 2022 Posted by Sean McWard 09 Jul Allergen [al-ler-jen] What it is: A substance that causes an allergic reaction in the body. This reaction can be topical or systemic. VIDEOS RELATED TO THIS TERM Russian Almond: File to FinishRussian Almond: Theory & PracticeNailphilia – The First Nail Art Exhibition – 10 Years On LEARN MORE TERMS View All Glossary Terms ACETONE EMBELLISHMENT LED GEL