noun Date: 1962 a device that measures the maximum rate of air flow out of the lungs during forced expiration and that is used especially for monitoring lung capacity of asthmatics
PEAK FLOW METER
Meaning of PEAK FLOW METER in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012