tolane

from The Century Dictionary.

• noun A colorless compound, C₆H₅C:CC₆H₅, prepared by the action of alcoholic potassium hydroxid on stilbene chlorid or bromide. It crystallizes in large plates or rods, melts at 60° C, and may be distilled. Also called diphenyl-acetylene.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Chem.) A hydrocarbon, C14H10, related both to the acetylene and the aromatic series, and produced artificially as a white crystalline substance; -- called also diphenyl acetylene.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun organic chemistry A hydrocarbon, C14H10, related to the acetylene and the aromatic series.