metered-dose inhaler

noun

me·​tered-dose inhaler ˌmē-tər(d)-ˌdōs- 

variants or metered dose inhaler

: a pocket-size handheld inhaler that delivers a standardized dose of medication for bronchodilation

Asthma drugs are delivered to the lungs by metered-dose inhalers …

—Denise Gellene, The Los Angeles Times

This medication taken via metered dose inhaler or nebulizer, is aimed at patients who have wheezing and coughing associated with chronic cigarette smoking.

—Discover

—abbreviation MDI