(anatomy) A bundle of nerve roots at the base of the spinal column

(medicine) A condition resulting from damage to the cauda equina, with symptoms including low back pain, pain that radiates down the leg, numbness around the anus, and loss of bowel or bladder control.

(obsolete) equine

plural of equinatoxin

(biochemistry) Any of a group of cytotoxic proteins found in Actinia equina.