absorptiometer
nounUK /əbˌzɔːp.ʃɪˈɒ.mɪ.ɚ/ · US /æbˌsɔɹp.ʃiˈɑm.ə.dɚ/
Etymology From absorption + -ometer (“measure”).
1
An instrument that computes the absorption rate by measuring the pressure of the gas; a colorimeter for liquids.
2
An instrument used to measure the amount of radiation or light absorbed.