D defs.my
Entry 1 sense Webster, 1913

Porotype

· Po·ro·type · IPA
01 n. A copy of a print, writing, etc., made by placing it upon a chemically prepared paper which is acted upon by a gas which permeates the pape…
  1. 1.
    A copy of a print, writing, etc., made by placing it upon a chemically prepared paper which is acted upon by a gas which permeates the paper of the print, writing, etc.