tonic

¹ton·ic

adj \ˈtän-ik\

Definition of TONIC

1

a : characterized by tonus <tonic contraction of muscle>; also : marked by or being prolonged muscular contraction <tonic convulsions> b : producing or adapted to produce healthy muscular condition and reaction of organs (as muscles)

2

a : increasing or restoring physical or mental tone b : yielding a tonic substance

—ton·i·cal·ly \ˈtän-i-k(ə-)lē\ adverb