sidereal clock


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Related to sidereal clock: sidereal time

sidereal clock

A clock regulated to measure the sidereal time at an observatory. See also transit circle.

sidereal clock

[sī′dir·ē·əl ′kläk]
(horology)
A clock set at 0 hours 0 minutes 0 seconds (midnight) as the vernal equinox crosses the meridian; it is the astronomical clock.
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References in periodicals archive ?
A sidereal clock by Boulton and his partner Fothergill, 1771-72 Matthew Boulton by Lemuel Francis Abbottt c 1798-1801.
Sidereal clock,Boulton & Fothergill Opposite: A portrait of Boulton by Lemuel Francis Abbottt
Matthew Boulton's famous sidereal clock, made at his manufactory in 1771, has vanished from the drawing room.