What is "cyamelide"

Cyamelide \Cy*am"e*lide\ (s[-i]*[a^]m"[-e]*l[i^]d or -l[imac]d; 104), n. (Chem.) A white amorphous substance, regarded as a polymeric modification of isocyanic acid.

n. (context organic compound English) A white amorphous substance, regarded as a polymeric modification of isocyanic acid.

Cyamelide is an amorphous white solid with the approximate formula (HNCO). It is the product of the polymerisation of cyanic acid together with its cyclic trimer cyanuric acid. It is a porcelain-like white substance which is insoluble in water.