pyrometric bead
noun
(in a kiln) a ball of material that indicates by changing color that a certain temperature has been reached.
Origin of pyrometric bead
First recorded in 1825–35
Words nearby pyrometric bead
pyromagnetic,
pyromancy,
pyromania,
pyrometallurgy,
pyrometer,
pyrometric bead,
pyrometric cone,
pyromorphite,
pyromucic aldehyde,
pyrone,
pyronine