S: (adj) tonic (of or relating to or producing normal tone or tonus in muscles or tissue) "a tonic reflex"; "tonic muscle contraction"
S: (adj) tonic, tonal (employing variations in pitch to distinguish meanings of otherwise similar words) "Chinese is a tonal language"
S: (adj) tonic, accented ((used of syllables) bearing the principle stress, usually accompanied by a change in pitch) "a tonic syllables carries the main stress in a word"
S: (adj) tonic (relating to or being the keynote of a major or minor scale) "tonic harmony"