heliostat.
/hee-lee-uh-stat/US // ˈhi li əˌstæt //UK // (ˈhiːlɪəʊˌstæt) //
定日镜,恒星仪,日光仪,太阳神
Definitions
n.noun · 名词
- 1.
- ›an instrument consisting of a mirror moved by clockwork, for reflecting the sun's rays in a fixed direction.
Examples
In a short time we might earnestly wish for a centrifugal apparatus or a heliostat.
Images of the sun are thrown into the observatory by an ingenious instrument run by clockwork, and called a heliostat.
In the absence of a heliostat the latter was the more convenient.
It is a good object by which to adjust my hand heliostat, which I describe below.
In the absence of a heliostat it is more convenient to obtain a point of light with the aid of a lens of short focus.
Level 4More words in h →