A chemical substance which is the principal constituent of silk, cobwebs, and the horny skeleton of sponges.
| 单词 | θ31888 |
| 释义 | the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [noun] > member of > parts of > skeletal parts > 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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