Question: what is the meaning of the root word meter in the word thermometer?
Answer: The second part of the word, meter, comes from the French -mètre (which has its roots in the post-classical Latin: -meter, -metrum and the ancient Greek, -μέτρον, or metron, which means to measure something, such as a length, weight, or width). ... The first use of the word 'thermometer.