The Collaborative International Dictionary
Subdial
Subdial \Sub*di"al\, a. [L. subdialis in the open air.]
Of or pertaining to the open air; being under the open sky.
[R.]
--N. Bacon.
Wiktionary
subdial
Etymology 1 n. A secondary dial set into the face of a dial. Etymology 2
a. Of or relating to the open air; outdoor.