riser

riser is defined in Webster's Unabridged Dictionary (1913) with 3 senses. The full text of each entry is reproduced verbatim below.

Definitions

  1. 1.(Arch.) (a) The upright piece of a step, from tread to tread. Hence: (b) Any small upright face, as of a seat, platform, veranda, or the like.
  2. 2.(Mining) A shaft excavated from below upward.
  3. 3.(Founding) A feed head. See under Feed, n.

Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).

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