ster·no·clei·do·mas·toid 
(stûr′nō-klī′də-măstoid)
(stûr′nō-klī′də-măstoid)n.
Either of two muscles of the neck that serve to flex the neck and rotate the head.
[STERN(UM) + Greek kleis, kleid-, collarbone + MASTOID.]
- country and western
- country club
- country cousin
- country-dance
- countryfied
- countryfied
- country gentleman
- country house
- countryman
- country mile
- country music
- country rock
- country seat
- countryside
- countrywide
- countrywoman
- county
- county palatine
- county seat
- county town
- countywide
- Countée
- coup
- coup de grâce
- coup de main