1) to draw to one's self, to rescue, to deliver
2) the deliverer
Part of Speech: verb
Citing in TDNT: 6:998, 988
Middle voice of an obsolete verb, akin to G4482 (through the idea of a current; compare G4511); to rush or draw (for oneself), that is, rescue: - deliver (-er).
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root ῥύομαι; click on the second column to search for that grammatical form of the root ῥύομαι; click on the third column to search for that word and grammatical form; click on the total to search for the root ῥύομαι.