middle period; mid- (era)
Used to refer to the middle part of a historical era or period, often in formal or written contexts. Can function as a noun or adverbially.
This system was established in the middle of the Edo period.
middle lobe (right lung); median lobe (prostate)
Anatomical term. Refers specifically to the middle lobe of the right lung or the median lobe of the prostate.
A shadow was found in the middle lobe of the right lung.