lignosulfonate
noun
lig·no·sul·fo·nate ˌlig-nō-ˈsəl-fə-ˌnāt 
: any of various compounds produced from the spent sulfite liquor in the pulping of softwood in papermaking and used especially for binders and dispersing agents
Example Sentences
Recent Examples on the Web The wood products business markets various grades of lignosulfonate across a range of applications and industries. 
Katherine Feser, Houston Chronicle, 12 July 2018
Katherine Feser, Houston Chronicle, 12 July 2018 Word History
First Known Use
1908, in the meaning defined above