- spindle - (biology) tiny fibers that are seen in cell division; the fibers radiate from two poles and meet at the equator in the middle; "chromosomes are distributed by spindles in mitosis and meiosis"
--1 is a kind of fiber, fibre
- spindle, mandrel, mandril, arbor - any of various rotating shafts that serve as axes for larger rotating parts
--2 is a kind of rotating shaft, shaft
--2 is a part of drive- spindle - a stick or pin used to twist the yarn in spinning
--3 is a kind of stick
--3 is a part of spinning wheel; spinning frame - spindle, mandrel, mandril, arbor - any of various rotating shafts that serve as axes for larger rotating parts