Chem. [Abbrev. of the full descriptive name: see quot.] A kind of test-paper.
1899. J. Cagney, trans. Jaksch’s Clin. Diagn., v. (ed. 4), 160. This [masking of the result] may be prevented by the use of tetra-paper (tetramethylparaphenyl-diamine). Ibid., vii. 382. Tetra-paper … immersed in the fluid will show the presence of ozone by taking a blue colour.
