Definitions

1. adjective

Pertaining to or resembling a condition or disease that recurs or reappears after a period of remission, especially in relation to polio.

“The patient suffered from atavic paralysis after being afflicted with polio as a child.”

2. noun

A symptom of polio that reappears after a period of remission, especially muscle weakness or paralysis.

“The doctor was aware of the patient’s atavic condition and was monitoring it closely.”