reticular formation reticular activating system • reticularia · · · Info · Definitions · Synonyms · Characters · · reticular formation · · Text Common · · Latin · · Scripts 19 · · Length 7 · · Syllables Definitions · · · (noun) a complex neural network in the central core of the brainstem; monitors the state of the body and functions in such processes as arousal and sleep and attention and muscle tone. Synonyms: reticular formation, RF. · · Noun Definition 1 Synonyms · · · rf · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 f latin small letter f U+0066 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075