allergen

"Pollen, dust, and spores are common allergens."

"The drummer emphasized the ands in the song, making the rhythm very clear. "

"The common good of the school is ensured by a strong parent-teacher association. "

"A thick layer of dust covered the old book. "

"The scientist carefully examined the substance to determine its chemical composition. "

"My younger brother is an allergic; he has severe allergies to peanuts and pollen. "

"They identified a burst pipe as the cause of the flooding."

"The old blueprints for the house used the are as a unit of measurement. "

"By now, you must surely know which is which."

"Bees collect pollen from flowers to make honey. "

"The announcement of the verdict brought a violent reaction."

"The mold grew in the damp basement, releasing tiny spores into the air that made my allergies worse. "