cellobiose

This term is used exclusively within the fields of biochemistry and organic chemistry to describe a specific disaccharide. It is characterized by its structural relationship to cellulose, serving as the repeating unit of the cellulose polymer. Because it is a specialized chemical compound, it is almost never encountered in general conversation or non-scientific literature.

As a chemical substance, it is treated as an uncountable mass noun. It refers to the molecular species itself rather than individual, discrete objects. Consequently, it does not have a plural form in standard scientific usage.