tonic

lime- or lemon-flavored carbonated water containing quinine

a sweet drink containing carbonated water and flavoring; "in New England they call sodas tonics"

(music) the first note of a diatonic scale

a medicine that strengthens and invigorates

of or relating to or producing normal tone or tonus in muscles or tissue; "a tonic reflex"; "tonic muscle contraction"

employing variations in pitch to distinguish meanings of otherwise similar words; "Chinese is a tonal language"

used of syllables; "a tonic syllables carries the main stress in a word"

relating to or being the keynote of a major or minor scale; "tonic harmony"

imparting vitality and energy; "the bracing mountain air"