Chronometry

Chronometry

The science of the measurement of time.

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Chronometry > Clock

direction sundial

Chronometry; Clock

Direction sundials, if portable, are oriented by a magnetic compass. They measure time by the hour angle of the sun relative to the meridian.

diptych sundial

Chronometry; Clock

A convenient form of pocket compass dial. It consists of a pair of rectangular metal or ivory plates, hinged along a shorter edge. When closed it is flat, but in use it is opened, ...

digital

Chronometry; Clock

Refers to a time display that uses no hands but shows the time in numbers and read out screen.

digital clock

Chronometry; Clock

Any clock which indicates the time by a display of figures rather than by a dial.

die

Chronometry; Clock

One kind of die is a tool used for cutting a thread on a rod. It usually takes the form of a disc of tool steel, with a center hole and two or more radially disposed holes which ...

diamantine

Chronometry; Clock

A white powder prepared from boron, processed to obtain the utmost purity. It is normally obtainable in three grades and used with a little oil for finishing and polishing steel. ...

dial feet

Chronometry; Clock

Clock dials are attached to the front plate of the movement by means of short cylindrical pillars, which are riveted to the dial so that they cannot be seen from the front. They ...