An oral thermometer is used for in the mouth and usually under the tongue. A rectal thermometer is used for taking your temperature from your rectum/bottom. They will be label in your grocery store or pharmacy whether there intended for your mouth or rectum.
Oral thermometer
The three types of thermometer are oral, rectal and tympanic. The most reliable is the rectal thermometer.
oral thermometer rectal thermometer aural thermometer feeling the forehead with your hand
thermometer
It is not possible to measure the room temperature with a thermometer. A digital oral thermometer will not work to measure the room temperature. It is meant to measure human temperature, not room temperature. You will need a room thermometer to measure the room temperature.
oral temperature oral temperature
Plastic
under the tongue to the side of the mouth
under the tongue to the side of the mouth
Celsius and Fahrenheit Thermometers Clinical Thermometers Ear (Tympanic) thermometers Pacifier Thermometers Underarm or Oral Thermometers Food Thermometers Outdoor Thermometers Mechanism of Different Types of Thermometers Mercury and Alcohol Thermometers Digital Thermometers Alcohol thermometer Beckmann differential thermometer Bi-metal mechanical thermometer Electrical resistance thermometer Galileo thermometer Infrared thermometer Liquid Crystal Thermometer Medical thermometer (e.g. oral thermometer, rectal thermometer, basal thermometer) Mercury-in-glass thermometer
digital that you put under your tounge.
The bent tube Earth thermometer is a kind of a measurement that is used for measuring temperature of the earths crust.