- noun a fibrous protein forming connective bundles of connective tissue, bone and cartilage
- One of the constituents of connective tissue (the supporting structure of the body). It is a fairly soft protein which breaks down into gelatine on prolonged boiling or cooking at low temperatures.
- noun a thick protein fibre forming bundles, which make up the connective tissue, bone and cartilage
- noun a thick protein fibre that forms bundles that make up the connective tissue, bone and cartilage