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单词	spongin
释义	spongin /ˈspʌn(d)ʒɪn / noun [mass noun] Biochemistry The horny or fibrous substance found in the skeleton of many sponges.Demospongea are the dominant modern group with 600 genera; they have a skeleton formed of spongin or silica, or a mixture of the two.... Some spicules are formed of the mineralized substances calcium carbonate and silica, while others are made of an organic substance called spongin. First of all, however, spongin is not a feature consistent of all Porifera, but may be a constituent character of the Demospongiae only.
随便看	en croute encrust encrustation encrypt encryption enculturation encumber encumbrance -ency encyc. encycl. encyclical encyclopaedia encyclopaedic encyclopaedism encyclopaedist encyclopedia encyclopedic encyclopedism encyclopedist encyst encystation encystment end -end

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