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A clock face or instrument resembling a clock face.
[L. dies, day]


a circular diagram with black lines radiating outward across a white background from the center, as is used in tests of astigmatism.


(dī′ăl) [L. dialis, daily, fr. dies, day]
A graduated circular face, similar to a clock face, on which some measurement is indicated by a pointer that moves as the entity being measured (pressure, temperature, or heat) changes.

astigmatic dial

A circular dial with black lines of uniform width drawn as if they were connecting opposing numbers on the face of a clock. It is used in testing for astigmatism.
References in periodicals archive ?
Figure 5 shows semidiagrammatically the essential parts of the main dial and of the manganin wire in its bakelite enclosure.
If so, under this sign Dial compounds culture with identity.
Winston Uchiyama, vice president of research & development, The Dial Corporation.
Much credit goes to GLOBUL for the outstanding market success of Fun Dial in Bulgaria," said Gadi Bahat, President of Comverse's EMEA division.
The Dial Corporation first introduced the original Dial Complete Antibacterial Foaming Hand Wash in 2001.
Using the EdgeView VoIP Support System and EdgeMarc routers, Edgewater Networks' Plug & Dial solution reduces the complex, multi-step and error-prone process of router and IP phone setup to a virtually hands-free installation experience.
The DIAL approach to meeting these challenges is tried and true: content is more flexible and adaptable when data, styling, layout, and interaction are described independently.
With up to 59 rapid dial keys, 99 department codes and 8MB flash memory, the FO-4470 can improve productivity across all business environments.
The Dial Corporation, a subsidiary of the Henkel Group, based in Dusseldorf, Germany, has launched their Partners in Innovation "Submit and Win" Sweepstakes.