tonic

(noun) lime- or lemon-flavored carbonated water containing quinine. Synonyms: tonic water, quinine water.

(noun) a sweet drink containing carbonated water and flavoring. Synonyms: pop, soda, soda pop, soda water. Examples: "In new england they call sodas tonics."

(noun) (music) the first note of a diatonic scale. Synonyms: keynote.

(noun) a medicine that strengthens and invigorates. Synonyms: restorative.

(adj) of or relating to or producing normal tone or tonus in muscles or tissue. Examples: "A tonic reflex." "Tonic muscle contraction."

(adj) employing variations in pitch to distinguish meanings of otherwise similar words. Synonyms: tonal. Examples: "Chinese is a tonal language."

(adj) used of syllables. Synonyms: tonic (vs. atonic), accented. Examples: "A tonic syllables carries the main stress in a word."

(adj) relating to or being the keynote of a major or minor scale. Examples: "Tonic harmony."

(adj) imparting vitality and energy. Synonyms: bracing, brisk, fresh, refreshing, refreshful. Examples: "The bracing mountain air."