Which term is used to describe the method of checking temperature under the armpit?

The method of checking temperature under the armpit is referred to as axillary temperature. This technique involves placing a thermometer in the hollow of the armpit to obtain a reading. It is commonly used as a non-invasive way to measure body temperature, especially in situations where other methods (like oral or rectal) may not be appropriate or feasible.

Using the axilla as a site for temperature measurement can yield a slightly lower reading compared to oral temperatures due to its proximity to the core of the body and the fact that it is more exposed to external air. In clinical practice, the axillary method is useful for patients who might be uncomfortable with more invasive methods or in cases where such methods could pose risks.

The other choices refer to different methods of taking body temperature: oral temperature is measured in the mouth, rectal temperature is taken in the rectum and typically provides a higher reading, while tympanic temperature is measured in the ear canal. Each of these methods has specific applications and advantages, but for the location under the armpit, axillary is the correct terminology.