Akademik

dial

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

- astigmatic d. a diagram of radiating lines, used to test for astigmatism.

* * *

di·al (diґəl) [L. dialis daily, from dies day] a circular area with graduations around the circumference and a centrally fixed pointer for indicating values of time, pressure, etc.

Medical dictionary. 2011.