单词	pyrheliometer
释义	pyrheliometer noun pyr·​he·​li·​om·​e·​ter ˌpī(-ə)r-ˌhē-lē-ˈä-mə-tər  ˌpir- : an instrument for measuring the sun's radiant energy as received at the earth pyrheliometric ˌpī(-ə)r-ˌhē-lē-ə-ˈme-trik  ˌpir- adjective Word History Etymology International Scientific Vocabulary First Known Use 1841, in the meaning defined above
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