"tonic" in the noun sense
1. tonic, tonic water, quinine water
lime- or lemon-flavored carbonated water containing quinine
2. pop, soda, soda pop, soda water, tonic
a sweet drink containing carbonated water and flavoring
"in New England they call sodas tonics"
3. tonic, keynote
music) the first note of a diatonic scale
4. tonic, restorative
a medicine that strengthens and invigorates
"tonic" in the adjective sense
of or relating to or producing normal tone or tonus in muscles or tissue
"a tonic reflex"
"tonic muscle contraction"
2. tonic, tonal
employing variations in pitch to distinguish meanings of otherwise similar words
"Chinese is a tonal language"
3. 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"
relating to or being the keynote of a major or minor scale
5. bracing, brisk, fresh, refreshing, refreshful, tonic
imparting vitality and energy
"the bracing mountain air"
Source: WordNet® (An amazing lexical database of English)
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