General term for any device that measures temperature, including clinical, room, and cooking thermometers.
体温を測るために温度計を使った。
I used a thermometer to take my temperature.
部屋の温度計は25度を示している。
The room thermometer shows 25 degrees.
I put a thermometer by the window in the room.
I measured the room temperature with a thermometer.
The thermometer read thirty-five degrees.
minimum thermometer
mercury thermometer