dust mitenoun [ C ]
uk/ˈdʌst ˌmaɪt//ˈdʌst ˌmaɪt/also house-dust mite, /ˈhaʊs dʌst ˌmaɪt//ˈhaʊs dʌst ˌmaɪt/a very small insect that lives in beds, carpets, curtains, etc. and can make people sneeze or have a runny nose or sore skin if they have an allergy to them