(in a kiln) a ball of material that indicates by changing color that a certain temperature has been reached.
noun 1. (in a kiln) a triangular piece of material that indicates by bending or melting that a certain temperature has been reached.
[pahy-rom-i-ter] /paɪˈrɒm ɪ tər/ noun 1. an apparatus for measuring high temperatures that uses the radiation emitted by a hot body as a basis for measurement. /paɪˈrɒmɪtə/ noun 1. an instrument for measuring high temperatures, esp by measuring the brightness (optical pyrometer) or total quantity (radiation pyrometer) of the radiation produced by the source. Other […]
[pahy-ruh-mawr-fahyt] /ˌpaɪ rəˈmɔr faɪt/ noun 1. a mineral, lead chlorophosphate, Pb 5 P 3 O 1 2 Cl, occurring in crystalline and massive forms, and of a green, yellow, or brown color; green lead ore: a minor ore of lead. /ˌpaɪrəʊˈmɔːfaɪt/ noun 1. a green, yellow, brown, or grey secondary mineral that consists of lead […]
[pahy-ruh-myoo-sik, pahy-] /ˈpaɪ rəˈmyu sɪk, ˌpaɪ-/ noun, Chemistry. 1. .