The OED is the only other dictionary also to define the word as a type of inflammation. It is considered an elliptic construction, for which no medieval attestations are provided.
s.
1anat.uvula (fleshy extension at the back of the soft palate):
(TBD)
Partes oris sunt iste: lingua, palatum [...] uvula (glosses: huvel, uvele, uvel), gula, labra [...]
i 196.5 and ii 126.5
(
MS: s.xiiim
)
Olibanum [...] a vertu de conforter et de confermer [...]: il est bon encuntre les lermes des oylz e la dolur de denz e encontre le huuel (l. huvel)87
[uvule] (s.xiiim)