siderostat

/sid-er-uh-stat/US // ˈsɪd ər əˌstæt //UK // (ˈsaɪdərəʊˌstæt) //

苷酸钠,苷酸酯,苷酸酶,苷脂酶

Definitions

n.名词 noun

1
- : a telescopic device for reflecting the light of a star in a constant direction, the chief component of which is a plane mirror turned by a clock mechanism to correct for the rotation of the earth.

The telescope was housed at the Exhibition in a long gallery pointing due north and south, the siderostat at the north end.
The siderostat, twenty-seven feet high, and as many in length, weighed forty-five tons.
The movable portion of the roof of the building had been slid back, and the mirror of the siderostat stood bared to the sky.