
1) Bee venom is one 2) Dander 3) Dust or pollen 4) It may lead to a breakout 5) Matter 6) Pollen 7) Pollen or dust 8) Sneeze cause 9) Sneeze-causing substance 10) Substance 11) Tobacco smoke
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https://www.crosswordclues.com/clue/allergen

1) Ragweed
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https://www.crosswordclues.com/clue/allergen

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

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

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

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

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

(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 ...
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http://www.encyclo.co.uk/local/21001

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

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

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.
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http://www.medterms.com/script/main/art.asp?articlekey=2194

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

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

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

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.
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http://www.wordinfo.info/words/index/info/view_unit/84/

a foreign substance (such as pollen, house dust, and various foods) that can produce a hypersensitive reaction in the body but is not necessarily intrinsically harmful.
Found on
https://cma.asn.au/about-cma/glossary/

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

a substance that causes an allergic reaction
Found on
https://www.encyclo.co.uk/local/20875
noun any substance that can cause an allergy
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https://www.encyclo.co.uk/local/20974

A substance, such as pollen or pet dander, that causes an allergy.
Found on
https://www.encyclo.co.uk/local/21273

An allergen is something that produces an allergic reaction.
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https://www.encyclo.co.uk/local/22743

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

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
No exact match found.