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脊索
jǐsuǒ
1. notochord (internal skeletal rod in primitive fish)

Character Breakdown

脊
jí
spine, backbone; ridge
10 丶
索
suǒ
cable, rope; rules, laws; to demand, to exact; to search, to inquire
HSK 5 10 丶

Compound Words (2)

脊索动物
jǐsuǒdòngwù
chordata
脊索动物门
jǐsuǒdòngwùmén
Chordata, phylum containing vertebrates

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Chinese