-扩展释义
plural noun
1.The art of constructing and using dials and sundials.
‘In al-Marrakushi’s work are developed the construction of planispheres, astrolabes, quadrants and the need of _gnomonics_ , which constituted the great interest of Sedillot who had written by far the best account on Muslim astronomical instruments.’
‘The _gnomonics_ is the science of sundials.’
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