D defs.my
Entry 4 senses Webster, 1913

Riser

/rīz'-ẽr/ · Ris·er · IPA /ˈɹaɪ.zə(ɹ)/
01 n. One who rises; as, an early riser.
  1. 1.
    One who rises; as, an early riser.
  2. 2.
    The upright piece of a step, from tread to tread.(Arch.)
  3. 3.
    A shaft excavated from below upward.(Mining)
  4. 4.
    A feed head. See under Feed, n.(Founding) See: Feed