
1) Third digit
Found on
https://www.crosswordclues.com/clue/medius

Latin, meaning: middle, the middle of, central, midst.
Found on
http://archives.nd.edu/mmm.htm

Medius is a genus of moths of the Micronoctuidae family. ...
Found on
http://en.wikipedia.org/wiki/Medius
[physician] Medius (Μήδιος; 4th-3rd century BC) a Greek physician who was a pupil of Chrysippus of Cnidos, and who lived therefore probably in the 4th and 3rd centuries BC. Galen says he was held in good repute among the Greeks, and quotes him apparently as a respectable authority on an anatomical question. Like the other pupils of Ch...
Found on
http://en.wikipedia.org/wiki/Medius_(physician)

the middle finger
Found on
http://phrontistery.info/m.html

• (n.) The third or middle finger; the third digit, or that which corresponds to it.
Found on
http://thinkexist.com/dictionary/meaning/medius/

(me´de-әs) Latin word meaning middle; a term used in anatomy.
Found on
http://www.encyclo.co.uk/local/21001
Me'di·us noun ;
plural Medii . [ New Latin , from Latin
medius middle. See
Medium .]
(Anat.) The third or middle finger; the third digit, or that which corresponds to it.
Found on
http://www.encyclo.co.uk/webster/M/40

Type: Term Pronunciation: mē′dē-ŭs Synonyms: middle
Found on
http://www.medilexicon.com/medicaldictionary.php?t=53521

Latin = middle.
Found on
https://www.encyclo.co.uk/local/21450

middle, the middle of.
Found on
https://www.math.ubc.ca/~cass/frivs/latin/latin-dict-full.html
No exact match found.