-raf, -rȧf noun
Etymology: International Scientific Vocabulary erg- + -graph; originally formed as Italian ergografo
: an apparatus or instrument with a recording device used to measure the work capacity of a muscle or group of muscles (as when exercised to exhaustion in the study of fatigue)
a weight ergograph attached to a finger
— compare dynamometer
• er·go·graph·ic | ̷ ̷ ̷ ̷|grafik adjective