• A colorless or pale yellow aromatic liquid, C<sub>3</sub>H<sub>3</sub>NS, containing a ring composed of a nitrogen atom, a sulfur atom, and three carbon atoms, used in making dyes and fungicides.
  • Any of various derivatives of this compound.
  • Any of a <xref>class</xref> of <xref>unsaturated</xref> <xref>heterocyclic</xref> <xref>compounds</xref> containing a <xref>ring</xref> of three <xref>carbon</xref> <xref>atoms</xref>, a <xref>sulphur</xref> and an <xref>nitrogen</xref> atom; especially the <xref>simplest</xref> one, C3H3SN.
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