Chiefly Zoology. The action of pulling back a retractile part or organ into the body; the fact of being retracted into the body; the ability to be…
单词 | θ18425 |
释义 | the world > life > biology > biological processes > movement > [noun] > retraction or involution (2) retraction?a1425 Chiefly Zoology. The action of pulling back a retractile part or organ into the body; the fact of being retracted into the body; the ability to be… involution1851 Anatomy. A rolling, curling, or turning inwards; concrete a part of a structure formed by this action. |
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