That state of a body, or of any of its organs or parts, in which the animal functions are healthy and performed with due vigor.

Tonicity; as, arterial tone.

The condition of normal balance of a healthy plant in its relations to light, heat, and moisture.

As applied to the body's muscles, tone refers to natural tension; i.e., the muscle's ability to resist passive elongation or stretch. Tone is the normal state of balanced tension and responsiveness of the body.

a firmness of muscles; the natural firmness of muscles when they are not being flexed.

See MUSCLE TONE.

The normal state of tension present in resting muscles.

the elastic tension of living muscles, arteries, etc. that facilitate response to stimuli; "the doctor tested my tonicity"

give a healthy elasticity to; "Let's tone our muscles"

The level of tension across joints, generated by the combination of connective tissue properties and muscle contraction.

Resistance or tension in a muscle when a limb or other body part is moved passively and in a relaxed state about a joint. A state of muscle tension balanced by partial contraction or alternate contraction and relaxation.

the degree of resistance of muscle to stretch

Firmness of muscle tissue.

The amount of muscle contraction when it is at rest. Too high, it is called spasticity; too low, hypotnia. Both interfere with movement.