the long, round, slender rod or pin in spinning wheels by which the thread is twisted, and on which, when twisted, it is wound; also, the pin on which the bobbin is held in a spinning machine, or in the shuttle of a loom.-a slender rod or pin on which anything turns; an axis; as, the spindle of a vane.-the shaft, mandrel, or arbor, in a machine tool, as a lathe or drilling machine, etc., which causes the work to revolve, or carries a tool or center, etc.-the vertical rod on which the runner of a grinding mill turns.-a shaft or pipe on which a core of sand is formed.-the fusee of a watch.-a long and slender stalk resembling a spindle.-a yarn measure containing, in cotton yarn, 15,120 yards; in linen yarn, 14,400 yards.-a solid generated by the revolution of a curved line about its base or double ordinate or chord.-any marine univalve shell of the genus rostellaria; -- called also spindle stromb.-any marine gastropod of the genus fusus.-to shoot or grow into a long, slender stalk or body; to become disproportionately tall and slender.