脊索动物 jǐsuǒdòngwù chordate Origin Definitions Defs Strokes Stroke Words Sentences Sents 脊索 jǐsuǒ notochord A flexible rod-like structure found in the embryos of all chordates, which develops into the spine in higher animals and remains throughout life in lower animals.动物 動物 dòngwù noun animal animal; living creature that can move and has senses