Wiktionary
diphenylacetylene
n. (context organic chemistry English) A colourless crystalline material widely used as a building block in organic chemistry and as a ligand in organometallic chemistry.
Wikipedia
Diphenylacetylene
Diphenylacetylene is the chemical compound CHC≡CCH. The molecule consists of phenyl groups attached to both ends of an alkyne. It is a colorless crystalline material that is widely used as a building block in organic synthesis and as a ligand in organometallic chemistry.