zetahttp://www.oed.com/dictionary/zeta_n2%3Ftab%3Dmeaning_and_usezeta, n.²
Revised 2018

† zetanoun2

Obsolete. historical.
  1. 1706–1860
    A kind of room or chamber.
    Only recorded in glossarial sources in English contexts, the sources disagreeing as to the precise meaning of the term.
    1. 1706
      Zeta,..a Room kept warm like a Stove; a withdrawing-Chamber with Pipes convey'd along in the Walls, to receive from below, either the cool Air, or the heat of warm Water. In our old Records, it is taken for a Dining-Room, Hall, or Parlour.
      Phillips's New World of Words (new edition)
    2. 1850
      Zeta, presumed to be a room over the porch of a Christian church.
      J. Weale, Rudimentary Dictionary of Terms Architecture iv. 550/1
    3. 1860
      Zeta, Zeteorila [? Zeticula],..the Vaporaria and Conclavia, or vapour-baths and inner closets, in the pavement of which warm or cold water was diffused as required.
      R. G. Mayne, Expository Lexicon Medical Science

zeta, n.² was revised in June 2018.

zeta, n.² was last modified in July 2023.