Read Edit View history 心材 xīncái heartwood Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 心材 · xīncái · heartwood 2026/03/04 心材 xīncái heartwood the dense inner part of a tree trunk, which is often harder and darker than the surrounding sapwood 这棵红木的心材呈现出深红色，质地非常坚硬。 noun created sense Mar 4, 2026, 02:25 AM