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Webster 1913 Edition

Adj.

[L.

subdialis

in the open air.]

Of or pertaining to the open air; being under the open sky.

[R.]

N. Bacon.

subdial ‎(plural subdials)

Latin subdialis in the open air.

subdial ‎(not comparable)

Of or relating to the open air; outdoor.
(Can we find and add a quotation of Francis Bacon to this entry?)