Allergen

An allergen is a type of antigen that produces an abnormally vigorous immune response in which the immune system fights off a perceived threat that would otherwise be harmless to the body. Such reactions are called allergies. In technical terms, an allergen is an antigen capable of stimulating a type-I hypersensitivity reaction in atopic individua...
Found on http://en.wikipedia.org/wiki/Allergen

allergen

<immunology> An antigenic substance capable of producing immediate type hypersensitivity reaction (allergy). ... (06 Oct 1997) ...
Found on http://www.encyclo.co.uk/local/20973

allergen

(allergy + -gen) a antigenic substance capable of producing immediate-type hypersensitivity (allergy).
Found on http://users.ugent.be/~rvdstich/eugloss/DIC/dictio04.html

allergen

(al´әr-jen) a substance, protein or nonprotein, capable of inducing allergy or specific hypersensitivity. a purified protein, most often of a food (such as milk, eggs, or wheat), a bacterium, or pollen, used to test a patient for hypersensitivity to specific substances (see skin test). Allergens may ...
Found on http://www.encyclo.co.uk/local/21001

allergen

noun any substance that can cause an allergy
Found on https://www.encyclo.co.uk/local/20974

allergen

[Noun] Plural form: allergens. Substances that cause an allergic reaction
Example: Dust, peanuts and cat hair are all common allergens.
Found on http://www.bbc.co.uk/skillswise/glossary/

Allergen

A substance that can produce an allergic reaction.
Found on http://www.cat-world.com.au/glossary

Allergen

a substance that causes an allergic reaction
Found on http://www.medichecks.com/glossary.cfm?ltr=A

Allergen

A substance that causes an allergic reaction in individuals sensitive to it.
Found on https://www.encyclo.co.uk/local/20094

allergen

A substance that causes an allergic response. Examples include pollen, molds, and certain foods.
Found on http://www.cancer.gov/dictionary?expand=A

Allergen

A substance that causes an allergy.
Found on http://www.gadsbywicks.co.uk/uploaded/3822.pdf

Allergen

A substance that causes the body to react hypersensitively to it
Found on http://www.i-sis.org.uk/Glossary.php

Allergen

A substance that is foreign to the body and can cause an allergic reaction in certain people. For examples, pollen, dander, mold.
Found on http://www.emedicinehealth.com/allergy_insect_sting/glossary_em.htm

Allergen

A substance that provokes an allergic response.
Found on http://www.superglossary.com/Glossary/Health/Vitamins/

Allergen

A substance which, when introduced into the body most often through being eaten, inhaled or skin contact, provokes an allergic state in sensitive individuals. E.g. pollen
Found on http://www.dwp.gov.uk/medical/med_conditions/glossary.html

Allergen

A substance, such as pollen or pet dander, that causes an allergy.
Found on http://www.apluspetgoods.com/petsupplies/dog-glossary.php

allergen

allergen A substance that is foreign to the body and can cause an allergic reaction in certain people; examples include: pollen, dander, mold; ragweed pollen is the allergen which causes hay fever.
Found on http://www.wordinfo.info/words/index/info/view_unit/84/

Allergen

Allergen is a substance that causes an allergic reaction.
Found on https://www.goodsalonguide.com/community/hair-and-beauty-glossary

Allergen

Allergen: A substance that is foreign to the body and can cause an allergic reaction in certain people. For examples, pollen, dander, mold.
Found on http://www.medterms.com/script/main/art.asp?articlekey=2194

Allergen

An allergen is a normal substance that causes an acute defensive reaction in a person's immune system. Common allergens are pet dander, smoke, and pollen, although the list of possible allergens is long and varied. When a person has a reaction to an allergen that person is said to be allergic to it.
Found on https://www.rabbitair.com/pages/air-purifier-glossary

Allergen

An allergen is a substance that reacts with the body's immune system and causes an allergic reaction.
Found on http://www.nhs.uk/Conditions/Pages/hub.xhtml

Allergen

An allergen is something that produces an allergic reaction.
Found on http://www.make-upusa.com/articles/cosmeticterms.htm

Allergen

An allergen is something that produces an allergic reaction.
Found on http://www.sherrayorganiccosmetics.com/did-you-know/beauty-skincare-glossar

Allergen

An antigen responsible for producing allergic reactions by inducing IgE formation.
Found on http://www.encyclo.co.uk/local/21016

allergen

An antigen that causes allergy.
Found on http://www.roitt.com/glossary.asp
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