Thiosemicarbazide

Part of speech: noun

Definitions

1. A chemical compound containing sulfur, nitrogen, and carbon atoms; used as a reagent in organic synthesis and as a ligand in coordination chemistry
2. An organic substance featuring thiourea-derived groups; employed in chemical reactions to form complexes and as an intermediate in creating other compounds
3. A sulfur- and nitrogen-rich molecule serving as a building block in synthetic chemistry; commonly utilized for its ability to bind metal ions and participate in various chemical transformations

Etymology: Thiosemicarbazide is a technical coinage built from two parts that each carry a clear chemical meaning. The first, "thio-", comes from the Greek "theion", meaning sulfur, and is used in chemistry to show that a sulfur atom has replaced an oxygen atom in a compound. The second part is "semicarbazide", a nitrogen-containing compound related to urea (carbamide), in which the "semi-" prefix signals a partial or half-version of the carbazide structure. Joining the two gives a name that tells a chemist exactly what the molecule looks like: a semicarbazide in which one oxygen has been swapped for sulfur.