astrocyte

n. star-shaped neuroglial cell which provides nutrients and insulation to nerve cells (Anatomy)

Astrocytes (also known collectively as astroglia) are characteristic star-shaped glial cells in the brain. They perform many functions, including biochemical support of endothelial cells which form the blood-brain barrier, the provision of nutrients to the nervous tissue, and a principal role in the repair and scarring process in the brain.
See more at Wikipedia.org...

Noun
1. comparatively large neuroglial cell
(hypernym) neurogliacyte, neuroglial cell, glial cell
(hyponym) fibrous astrocyte
(part-holonym) astroglia, macroglia

noun
star-shaped brain cell

[AS-troe-site]
A type of cell found in the brain and spinal cord. An astrocyte is a small, star-shaped glial cell (a cell thatsurrounds and supports nerve cells).