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Micrograph of a section of cartilage showing the extracellular matrix.

(genetic biology)

Grammar: noun
plural: matrixes, matrices
Definition: the substance in which cells are embedded
Example:
1. The helix structure of keratin generates long threads that form the structural matrix of mammalian hair, bird feathers and turtle shells.

2. Cell adhesion is the ability of cells to stick to each other, and to extracellular matrixes like fibronectin.
Alternative Form: ground substance