See also fatigue.analepsis, analepsy Obsolete, recovery of strength after an illness. See also food and nutrition. armipotence Rare. strength in battle. asthenia Medicine. any of several conditions characterized by lack or loss of strength and energy, as neurasthenia, myasthenia, or somasthenia. —asthenie, adj. equipollence, equipollency equalness of force, validity, etc. —equipollent, adj. See also logic. hypopotencia, hypopotency Medicine. a condition of diminished power, especially of diminished electrical activity of the cerebral cortex. hyposthenia a condition of abnormal weakness or loss of strength. —hypos-thenic, adj. impotency 1. a condition of reduced or absent power; weakness. 2. a complete failure of sexual power, especially in the male. Also called impotence, impotentness. —impotent, adj. invalescence Obsolete, a state of good health; strength. invertebracy the state or quality of being invertebrate or without a backbone, as certain organisms, animals, etc.; hence, spinelessness; exhibiting a lack of strength of character. —invertebrate, adj. lability the susceptibility to error or lapses of any kind, as a human failing. —labile, adj. milksopism 1. the state or quality of being a weak and ineffectual person. 2. behavior or attitudes typical of a milksop. myoatrophy atrophy or wasting away of the muscles. omnipotence the state or quality of being infinite in power, authority, or might. —omnipotent, adj. sthenia strength of body; vital force. —sthenic, adj. tonicity the state or quality of having good muscular tone or tension. —tonic, adj.