sartorius: a muscle in the thigh that helps to rotate the leg into the sitting position assumed by a tailor; the longest muscle in the human body
skeletal muscle: a muscle that is connected at either or both ends to a bone and so move parts of the skeleton; a muscle that is characterized by transverse stripes
hyperbilirubinemia of the newborn: a common disorder that is usually due to immaturity of the liver; usually subsides spontaneously