matrix
the clear part of the cytoplasm(= the substance that surrounds the cell's nucleus) inside a cell:
The cytoplasmic ground substance of infected cells consisted of granular material which was different in appearance from the spongy material constituting the cytoplasmic matrix of uninfected cells.
Structural components of the dermis are collagen, elastic fibres, and extrafibrillar matrix, previously called ground substance.
Bone matrix is the extracellular mineralized material of bone and consists of a ground substance in which is imbedded numerous collagen fibres.
The cytoplasm is almost always clear with no obvious ground substance.

SMART Vocabulary: related words and phrases

Substances & structures in the body
abductor
accessorius
ACL
actin
adductor
fundus
funiculus
fusiform
glomerular
glomerulus
navicular
neuroendocrine
neurohormonal
neurohormone
nociceptive
tendinous
tendinum
tendo
tensor
Th

You can also find related words, phrases, and synonyms in the topics:

Cells