1
- a medicinal substance taken to give a feeling of vigour or well-being补药, 滋补品。
1.1
- something with an invigorating effect具恢复精力功效的东西：
being needed is a tonic for someone at my age.
对于我这年纪的人来说, 对别人有用是件令人振奋的事情。
2
- short for TONIC WATER.TONIC WATER的简称。
3
- Music the first note in a scale which, in conventional harmony, provides the keynote of a piece of music【乐】主音。
1
- giving a feeling of vigour or well-being; invigorating有活力的; 令人振奋的。
2
- Music relating to or denoting the first degree of a scale【乐】主音的。
3
- Phonetics denoting or relating to the syllable within a tone group that has greatest prominence, because it carries the main change of pitch【语音】（音节）有主重音的。
4
- relating to or restoring normal tone to muscles or other organs（与）肌肉恢复正常紧张性（有关）的; （与）器官恢复正常紧张性（有关）的。
4.1
- Physiology relating to, denoting, or producing continuous muscular contraction【生理】（肌肉）紧张的, 强直的。
派生词
tonically
adverb词源
mid 17th cent.: from French tonique, from Greek tonikos 'of or for stretching', from tonos （see TONE）.