tonus Tonto • tony · · · Info · Definitions · Synonyms · Characters · · tonus · · Text Latin · · Script 5 · · Length Definitions · · · (noun) the elastic tension of living muscles, arteries, etc. that facilitate response to stimuli. Synonyms: tonicity, tone. Example: "The doctor tested my tonicity." · · Noun Definition 1 Synonyms · · · tonicity · · Synonym 1 tone · · Synonym 2 Characters · · n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075