髓脑 suǐnǎo brains Definitions Defs Origin 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脑 腦 nǎo noun brain The brain of a person or animal; the organ in the head that controls thought and movement.