poop pill
n.— «Core temperature is measured by ingesting a pill the size of a multi-vitamin that contains a sensor and a radio transmitter. It sends body temperatures to a receiver every 15 seconds. The pill is digestable, so it’s affectionately known as the “poop pill.”» —“Olympians getting steamy” in Victoria, British Columbia Globe and Mail (Toronto, Canada) July 21, 2008. (source: Double-Tongued Dictionary)
Further reading
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