clinical thermometer
A device for measuring body temperature, often used in medical settings. Compare 体温計, which is more common in everyday language.
See also: 体温計
The nurse measured the patient's temperature with a clinical thermometer.
Compound of 検 (けん, 'examine') + 温 (おん, 'temperature') + 器 (き, 'instrument'). The exact historical derivation is uncertain, but the kanji straightforwardly describe a temperature-measuring device.