1. an instrument that automatically records temperature variations over time
Usage: scientific; meteorological

Examples

• The weather station’s thermograph showed a steady temperature rise throughout the day.
• Scientists used a thermograph to monitor temperature changes in the laboratory.
• The thermograph recorded unusual temperature fluctuations during the night.
• Hospital staff checked the thermograph to ensure the vaccine storage remained at proper temperature.
• The old thermograph produced a continuous paper chart showing weekly temperature patterns.
• Meteorologists rely on thermograph data to track climate trends over time.