Adjective
1. of or relating to or producing normal tone or tonus in muscles or tissue;
"a tonic reflex""tonic muscle contraction"2. employing variations in pitch to distinguish meanings of otherwise similar words;
"Chinese is a tonal language"3. used of syllables;
"a tonic syllables carries the main stress in a word"4. relating to or being the keynote of a major or minor scale;
"tonic harmony"5. imparting vitality and energy;
"the bracing mountain air"