髓结 suǐjié pith knot Origin Definitions Defs Strokes Stroke Words Sentences Sents 髓 suǐ noun marrow (bound form) bone marrow; tissue in the center of certain organs such as the spinal cord; pith or central tissue in plant stems结 結 jié noun knot A knot or node; something shaped like a knot, such as the Adam's apple.