tonic
//ˈtɒn.ɪk//
Noun
tonicSingular
tonicsPlural
1
A medicinal drink taken to give a feeling of vigor or well-being.
My grandmother drinks a herbal tonic every morning for her health.
2
A carbonated soft drink, especially one mixed with alcoholic drinks such as gin.
I'll have a gin and tonic, please.
3
In music, the first note of a scale, which forms the keynote of a piece.
The tonic of the C major scale is the note C.
Synonym
Adjective
tonicCanonical form
1
Giving a feeling of vigor or well-being; invigorating.
The cool mountain air had a tonic effect on her.
2
Relating to or denoting the first degree of a musical scale.
The melody returns to the tonic note at the end of the phrase.