A period of sleep characterized by decreased metabolic activity, slowed breathing and heart rate, and the absence of dreaming. In humans and certain other animals, the sleep cycle occurs in five stages, the first four consisting of non-REM sleep and the last stage consisting of REM sleep. This cycle repeats itself about five times during a normal episode of sleep. In non-REM sleep, Stage I is characterized by drowsiness, Stage II by light sleep, and Stages III and IV by deep sleep. In adult humans, non-REM sleep accounts for about 75-80 percent of total sleep. Also called NREM sleep. Compare REM sleep. See more at sleep.
[ri-myoo-nuh-rey-shuh n] /rɪˌmyu nəˈreɪ ʃən/ noun 1. the act of . 2. something that ; reward; pay: He received little remuneration for his services. /rɪˌmjuːnəˈreɪʃən/ noun 1. the act of remunerating 2. pay; recompense n. c.1400, from Middle French remuneration and directly from Latin remunerationem (nominative remuneratio) “a repaying, recompense,” noun of action from past […]
[ri-myoo-ner-uh-tiv, -nuh-rey-tiv] /rɪˈmyu nər ə tɪv, -nəˌreɪ tɪv/ adjective 1. affording remuneration; profitable: remunerative work. 2. that . /rɪˈmjuːnərətɪv/ adjective 1. earning money or rewards; paying adj. 1620s, “inclined to remunerate,” from remunerate + -ive. From 1670s as “rewarding;” 1859 as “profitable.” Related: Remuneratively; remunerativeness.
[ri-noo, -nyoo] /rɪˈnu, -ˈnyu/ adjective 1. able to be : a library book that is not renewable. noun 2. something that is renewable. /ˌnɒnrɪˈnjuːəbəl/ adjective 1. not able to be restored, replaced, recommenced, etc: nonrenewable resources adj. 1727, from renew + -able. In reference to energy sources, attested by 1971. nonrenewable (nŏn’rĭ-n’ə-bəl) Relating to a […]
[ri-noo, -nyoo] /rɪˈnu, -ˈnyu/ adjective 1. able to be : a library book that is not renewable. noun 2. something that is renewable. adj. also nonrenewable, 1946, from non- + renewable. adj. 1727, from renew + -able. In reference to energy sources, attested by 1971. renewable (rĭ-n’ə-bəl) Relating to a natural resource, such as solar […]