Rapid-eye-movement
noun
1.
rapidly shifting, continuous movements of the eyes beneath closed lids during the stage of sleep characterized by dreaming.
noun
1.
movement of the eyeballs under closed eyelids during paradoxical sleep, which occurs while the sleeper is dreaming REM
rapid eye movement n.
Abbr. REM The rapid periodic jerky movement of the eyes during certain stages of the sleep cycle when dreaming takes place.
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noun 1. . rapid eye movement sleep (rāp’ĭd) See REM sleep.
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[rap-id-fahyuh r] /ˈræp ɪdˈfaɪər/ adjective 1. characterized by, delivered, or occurring in rapid succession: rapid-fire questions; rapid-fire events. 2. Military. discharging in rapid fire: rapid-fire rifles. 3. discharging, operating, etc., at a rate more rapid than normal: a rapid-fire staple gun. noun, Military. 1. a rate of firing small arms that is intermediate between slow […]
- Rapidity
[ruh-pid-i-tee] /rəˈpɪd ɪ ti/ noun 1. a state or quality; quickness; celerity. n. 1650s, from French rapidité and directly from Latin rapiditatem (nominative rapiditas) “swiftness, rapidity, velocity,” from rapidus “hasty, swift, rapid” (see rapid).
- Rapidly
[rap-id] /ˈræp ɪd/ adjective, sometimes, rapider, rapidest. 1. occurring within a short time; happening speedily: rapid growth. 2. moving or acting with great speed; swift: a rapid worker. 3. characterized by speed: rapid motion. noun 4. Usually, rapids. a part of a river where the current runs very swiftly. /ˈræpɪd/ adjective 1. (of an action […]
- Rapido
[rah-pee-doh; Spanish rah-pee-th aw; Italian rah-pee-daw] /ˈrɑ piˌdoʊ; Spanish ˈrɑ piˌðɔ; Italian ˈrɑ pi dɔ/ noun, plural rapidos [rah-pee-dohz; Spanish rah-pee-th aws] /ˈrɑ piˌdoʊz; Spanish ˈrɑ piˌðɔs/ (Show IPA). Italian, rapidi [rah-pee-dee] /ˈrɑ pi di/ (Show IPA) (esp. in Spain, Italy, and Latin America) 1. an express train.