pyroid

English

Adjective

pyroid (not comparable)

1. (chemistry) Pertaining to noble metals, such as gold and silver.
   • 1943, Ole Gisvold, Charles Herbert Rogers, The Chemistry of Plant Constituents, page 79:

     By warming with pyridine, H. H. Schlubach1 was able to force the equilibrium between the pyroid and furoid modification of galactose so far toward the furoid form, that the β-pentacetylgalactofuranose was prepared in practical quantities.

2. Having a tapered shape.
   • 1979, Y. Chaturvedi, S. Khera, Studies on Taxonomy, Biology, and Ecology of Nematodes, page 89:

     The females were pyroid in shape, without any neck.

Noun

pyroid (countable and uncountable, plural pyroids)

1. Pyrolytic graphite.
   • 1976, Manfred Kaminsky, Radiation Effects on Solid Surfaces, page 99:

     Both basal-oriented and edge-oriented (basal planes perpendicular to the surface) samples of pyroid were implanted.