Definition: The "Anthracometer" refers to a device that measures temperatures using an unknown quantity, such as carbon dioxide or water vapor, which changes in specific ways under different conditions. It's used for precise measurement of temperature variations from very small differences in pressure. Detailed definitions: - "Anthracometer": A device designed to measure the temperature of objects by measuring changes in a substance through the emission or absorption of heat. - The word 'anthracometer' refers to a scientific instrument that is used for precise measurements and analysis, particularly with respect to temperature variations.