heliodonn.
/ˈhiːlɪəʊdɒn/ A mechanical apparatus for demonstrating the sun's apparent motion, used in astronomy or in architectural design.
ΘΚΠ
the world > the universe > cosmology > science of observation > astronomical instruments > representational device > [noun] > mechanical > sun
eclipsareon1799
heliodon1909
1909 in Webster's New Internat. Dict. Eng. Lang.
1932 Dufton & Beckett in Jrnl. Sci. Instrum. 9 253 In the Heliodon, the apparatus which is the subject of the present paper, the representation of the motion of the sun is simplified.
1964 New Scientist 30 Jan. 288/1 Models of a building..with an artificial Sun would be of immense value... Although individual machines were given such names as ‘sunshine analyser’ or ‘solarometer’, the generic name for them is ‘heliodon’.
This entry has not yet been fully updated (first published 1976; most recently modified version published online March 2018).
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n.1909