s, tris-]
| 1. | a spasm of the jaw muscles that makes it difficult to open the mouth. |
| 2. | lockjaw. |

tris·mus (trĭz'məs) n. See lockjaw. [New Latin, from Greek trismos, a grinding, variant of trigmos, a scream.] tris'mic (-mĭk) adj. |
trismus tris·mus (trĭz'məs)
n.
A firm closing of the jaw due to tonic spasm of the muscles of mastication from disease of the motor branch of the trigeminal nerve. It is usually associated with general tetanus. Also called lockjaw.