A substance with medicinal properties intended to restore or invigorate.
We used to brew a tonic from a particular kind of root.
Tonic water.
(Massachusetts) Any of various carbonated, non-alcoholic beverages; soda pop.
Someone or something that revitalises or reinvigorates.
The first note of a diatonic scale; the keynote.
The triad built on the tonic note.
A tonic element or letter; a vowel or a diphthong.