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Webster 1913 Edition
fossa
‖
fos′sa
,Noun.
pl.
fossæ
(#)
. [L., a ditch. See
Fosse
.] (Anat.)
A pit, groove, cavity, or depression, of greater or less depth;
as, the temporal
fossa
on the side of the skull; the nasal fossæ
containing the nostrils in most birds.