sthenic adjective. ['sƟɛnɪk] L18.
[from Greek sthenos strength, after ASTHENIC.]
Medicine. Orig. (now rare or obsolete), of a disease etc.: characterized by normal or excessive vital energy. Now, strong and active; having an athletic physique; Psychology having a strong and vigorous personality, with a tendency to aggressive behaviour. Cf. ASTHENIC.

■ sthenia noun (now rare or obsolete) a condition of normal or excessive strength and activity L18.

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