A chemical substance which is the principal constituent of silk, cobwebs, and the horny skeleton of sponges.
| 单词 | θ56447 |
| 释义 | the world > textiles and clothing > textiles > silk > [noun] > principle constituent of (1) fibroin1861 A chemical substance which is the principal constituent of silk, cobwebs, and the horny skeleton of sponges. |
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