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Dictionary definition for: Tonic

1. (n) lime- or lemon-flavored carbonated water containing quinine

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

3. (n) a sweet drink containing carbonated water and flavoring; "in New England they call sodas tonics"

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

5. (n) (music) the first note of a diatonic scale

6. (a) used of syllables; "a tonic syllables carries the main stress in a word"

7. (n) a medicine that strengthens and invigorates

8. (s) relating to or being the keynote of a major or minor scale; "tonic harmony"

9. (s) imparting vitality and energy; "the bracing mountain air"

WordNet 2.1 Copyright Princeton University. All rights reserved.