tor·ti·col·lis 
(tôr′tĭ-kŏlĭs)
(tôr′tĭ-kŏlĭs)n.
A contracted state of the neck muscles that causes the neck to rotate and tilt sideways, forwards, or backwards. Also called wryneck.
[New Latin : Latin tortus, twisted, past participle of torquēre, to twist; see terkw- in the Appendix of Indo-European roots + collum, neck; see kwel-1 in the Appendix of Indo-European roots.]