Noun
extracellular matrix (plural extracellular matrices)
(anatomy, cytology, histology) All the microscopic fibres and other molecular structures that are produced by a particular type of cell but are not part of it (that is, that lie outside its cell membrane), providing support to the cells and often serving as a co-constituent of the tissue that they constitute, especially a connective tissue.
Extracellular matrix The extracellular matrix (ECM) is involved in keeping tissues separated, providing structural support or providing a structure for cells to migrate on. Source: Internet