sternum

n (pl ~s or sterna / 5st\:nE;`st[nE/) (anatomy 解) = breastbone (breast).

stepping-stone, stepson, `stepdaughter, stereo, stereo-, stereophonic, stereoscope, stereoscopic, stereotype, stereotyped, stereotyping, sterile, sterility, sterilization, sterilization, sterilisation, sterilize, sterilize, sterilise, sterling, stern, sternly, sternness, steroid, stertorous, stertorously, stet, stethoscope, stetson, stevedore, stew, steward, stewardess, stewardship, stewed, Sth, stick, stick (sth) out, stick at sth, stick by sb, stick insect, stick out, stick out for,