transmissometer
noun
trans·mis·som·e·ter ˌtran(t)s-(ˌ)mi-ˈsä-mə-tər 
ˌtranz-
: an instrument for measuring the transmission of light through a fluid (such as the atmosphere)
Word History
First Known Use
circa 1931, in the meaning defined above
- periodontologies
- periodontology
- periodoscope
- periods
- perioeci
- perioecian
- perioecic
- perioecid
- perioecus
- periogue
- perionychia
- perionychium
- perionychiums
- perioperative
- periophthalmi
- periophthalmuses
- periophthalmusses
- perioptometry
- periorchitis
- periorificial
- periostea
- periosteal
- periosteoma
- periosteomas
- periosteomata