Hey there are several types of themometers, definition being the instrument used to measure temperaure. There are lots of different kinds, temporal, and Ido love thi kind, you place it on your forehead, very easy and painless, food thermometer, digital thermometer, Galileo thermometers, oral thermometers and ahhh yes, the dreaded rectal thermometer. I remember that one painfully from my childhood. It just doesn’t pay for your next door neighbor to be nurse. Just relax, this won’t hurt a bit. Yeow!!!!