Definition of spongin in English:

spongin

Syllabification: spon·gin
Pronunciation: /ˈspənjin
 
/

noun

Biochemistry
The horny or fibrous substance found in the skeleton of many sponges.
More example sentences
  • 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.

Definition of spongin in:

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Word of the day apposite
Pronunciation: ˈapəzit
adjective
apt in the circumstances or relation to something