collagen

Definition

The main structural protein in the extracellular matrix of the connective tissues of many animals.

Etymology

From French collagène, coined from Ancient Greek κόλλα (kólla, “glue”) and -γενής (-genḗs, “-forming”) (see -gen); it is the main substance that animal glues are derived from. Doublet of collage, colloid, and protocol.

Example Sentences

• "Science cannot yet account for the conversion of collagen into gelatin."