nóng đỏ
Definition
- Adjective (Physics/Metallurgy):
- Red-hot: Describes an object that is glowing with a bright red color due to being heated to an extremely high temperature. This indicates a specific thermal state where the object emits visible light.
Usage Examples
- Adjective:
- Sắt được nung đến nóng đỏ trước khi rèn. (The iron was heated to red-hot before forging.)
- Đầu mỏ hàn trở nên nóng đỏ. (The soldering iron tip became red-hot.)
- Thanh kim loại nóng đỏ phát sáng trong bóng tối. (The red-hot metal bar glowed in the dark.)
Advanced Usage
- The term is primarily technical and descriptive. It is often used in contexts involving metalworking, blacksmithing, materials science, and physics to describe a precise stage of heating.
Variants and Related Words
Nóng trắng (adj): White-hot. Describes an object heated to an even higher temperature than red-hot, emitting a white light.
- Ngôi sao có nhiệt độ bề mặt nóng trắng. (The star has a white-hot surface temperature.)
Nóng chảy (adj/v): Molten; to melt. Describes a substance that has liquefied due to heat.
- Thép nóng chảy được đổ vào khuôn. (The molten steel is poured into a mold.)
Synonyms
- Incandescent: Emitting light as a result of being heated.
- Glowing red: Emitting a red glow from heat.
Related Idioms
- While "nóng đỏ" itself is not typically used in idiomatic expressions, the concept appears in phrases describing intense heat or a critical state, such as in the context of a situation becoming "red-hot" or highly tense.