Definitions of spindle:

• noun:   a stick or pin used to twist the yarn in spinning
• noun:   any of various rotating shafts that serve as axes for larger rotating parts
• noun:   (biology) tiny fibers that are seen in cell division; the fibers radiate from two poles and meet at the equator in the middle

  Example: "Chromosomes are distributed by spindles in mitosis and meiosis"

• name:  A surname (very rare: popularity rank in the U.S.: #67630)