actigraphy
n.— «They also filled out sleep questionnaires, kept a log of their hours in bed and participated in six nights of sleep studies with a technique called wrist actigraphy that uses a motion sensor—worn like a watch—to estimate actual sleep duration.» —“Heart Disease Associated With Lack of Sleep” by Lynn Shapiro DOTmed.com Dec. 29, 2008. (source: Double-Tongued Dictionary)
Further reading
Do you refer to nighttime sleepwear as jammies, jommies, or something else? A Nashville, Tennessee, woman says that her family referred to pajamas as jommies, while her husband’s family always called them jammies. Although jammies is the far more...
Diamond dust, tapioca snow, and sugar icebergs — a 1955 glossary of arctic and subarctic terms describes the environment in ways that sound poetic. And a mom says her son is dating someone who’s non-binary. She supports their relationship, but...