English dictionary

REM

/r/E/m/

Definitions, examples, synonyms and antonyms from WordNet 3.0.

noun

a recurring sleep state during which dreaming occurs; a state of rapidly shifting eye movements during sleep

noun.state

Synonyms paradoxical sleep rapid eye movement rapid eye movement sleep rem sleep

Source: WordNet 3.0
(Roentgen Equivalent Man) the dosage of ionizing radiation that will cause the same amount of injury to human tissue as 1 roentgen of X-rays

noun.quantity

Source: WordNet 3.0