'manometer' originates from Greek, specifically the word 'manos,' where 'manos' meant 'thin' or 'sparse,' and 'metron' meant 'measure.'

'manometer' changed from the French word 'manomètre' and eventually became the modern English word 'manometer'.

Initially, it meant 'an instrument to measure thinness or sparseness,' but over time it evolved into its current meaning of 'an instrument for measuring pressure.'