noun
Refers specifically to mites of the genus Dermatophagoides, commonly found in household dust and a major allergen source.
チリダニはアレルギーの原因になることがあります。
House dust mites can cause allergies.
布団にチリダニが繁殖しやすい。
House dust mites tend to breed in futons.
Compound of 塵 (chiri, 'dust') and 蜱 (dani, 'mite'). The kanji 蜱 is obscure, so the word is normally written in kana.