actinometer

noun

  1. A device used to measure the heating power of electromagnetic radiation, especially that of solar radiation.

Similar Words

actability actable acted /ˈæk.tɪd/ actionable /ˈæk.ʃə.nə.bəl/ activate /ˈæktɪˌveɪt/ activating active /ˈæk.tɪv/ actor /ˈæk.tə/ act /æk/ actin