Medicine. Restlessness (of the body), caused by pain, uneasiness, or debility.

Used by Brown (see sthenic, adj.) for: Normal or excessive ‘excitability’ or vital power. Opposed to asthenia.

Excitement of an organ or tissue in an unusual degree; also transferred morbid over-activity of the mental powers or passions.

Extreme or morbid excitement of the vital powers; the opposite of asthenia.

lassitude, restlessness, irritability, or aggressiveness resulting from being confined for too long with few or no companions.