spindle definition

1. (biology) tiny fibers that are seen in cell division; the fibers radiate from two poles and meet at the equator in the middle
• examples: chromosomes are distributed by spindles in mitosis and meiosis
2. a piece of wood that has been turned on a lathe; used as a baluster, chair leg, etc.
3. any of various rotating shafts that serve as axes for larger rotating parts
4. a stick or pin used to twist the yarn in spinning