adj. Of or pertaining to tetanus; having the character of tetanusadj. Producing, or tending to produce, tetanus, or tonic contraction of the muscles. See Tetanic, n.n. A substance (notably nux vomica, strychnine, and brucine) which, either as a remedy or a poison, acts primarily on the spinal cord, and which, when taken in comparatively large quantity, produces tetanic spasms or convulsions.