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Children's Dictionary
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allergy a condition in which a person's body has an unusual reaction to certain things. An allergy can cause itching, coughing, sneezing, or trouble breathing. Allergies to animal hair, pollen, and certain foods are among the most common.
anther the part of a flower's stamen that bears pollen.
hay fever a condition marked by a runny nose, sneezing, and headache that is caused by an allergy to plant pollen.
pollen the fine, yellow powder made by a flowering plant. When pollen is carried by the wind or by an insect to another plant of the same kind, it fertilizes that plant's seeds.
pollinate to move or carry pollen to a plant, causing the seeds to be fertilized.
ragweed a weed that produces a large amount of pollen in the fall. Many people are allergic to ragweed.
stamen the part of a flower that makes and bears the pollen.