減げん輝き

noun

decalescence

Technical term in metallurgy: the absorption of heat when iron or steel is heated through a critical transformation point, causing a temporary darkening or decrease in glow. Extremely rare in general Japanese.

• 減げん輝きは、鉄てっ鋼こうの熱ねつ処しょ理りにおいて観かん察さつされる現げん象しょうである。

  Decalescence is a phenomenon observed in the heat treatment of iron and steel.