the reappearance in an individual of characteristics of some remote ancestor that have been absent in intervening generations.
an individual embodying such a reversion.
reversion to an earlier type; throwback.
the recurrence in a plant or animal of certain primitive characteristics that were present in an ancestor but have not occurred in intermediate generations
reversion to a former or more primitive type
1833, from French atavisme, attested by 1820s, from Latin atavus “ancestor, forefather,” from at- perhaps here meaning “beyond” + avus “grandfather,” from PIE *awo- “adult male relative other than the father” (see uncle).
atavism at·a·vism (āt’ə-vĭz’əm)
The appearance of characteristics that are presumed to have been present in some remote ancestor; reversion to an earlier biological type.
loss of coordination of the muscles, especially of the extremities. Historical Examples Does not get on feet when turned on side; ataxia well marked. The Propaganda for Reform in Proprietary Medicines, Vol. 2 of 2 Various His name was Sabathier, and for fifteen years he had been stricken with ataxia. The Three Cities Trilogy, Complete […]
- Ataxia telangiectasia
ataxia telangiectasia ataxia telangiectasia n. A disease characterized by progressive ataxia due to disease in the cerebellum, oculocutaneous telangiectases, proneness to pulmonary infections, and immunodeficiency.
ataxiaphasia ataxiaphasia a·tax·i·a·pha·sia (ə-tāk’sē-ə-fā’zhə) n. Inability to form connected sentences.
loss of coordination of the muscles, especially of the extremities. Historical Examples With these methods, needing not more than twenty minutes three times a day, the ataxic symptoms sometimes rapidly diminish. Fat and Blood S. Weir Mitchell There are three stages: The preataxic, the ataxic, the bed-ridden paralytic. Encyclopaedia Britannica, 11th Edition, Volume 16, Slice […]