n. a star-shaped object in a cell that surrounds the *centrosome during mitosis and meiosis and is concerned with the formation of the *spindle.
1. a degenerative condition, formerly known as asteroid hyalitis, in which tiny deposits of calcium are suspended in the vitreous humour. They are more commonly seen in the elderly and usually cause no decrease in vision. 2. see synchysis scintillans.... asteroid hyalosis