1) chrysoprasus is a stone of green colour, inclined to that of gold, from whence it has its name; for this is agate in the breast plate, which was Naphtali's stone. (Gill)
Part of Speech: noun masculine
From G5557 and πράσον prason (a leek); a greenish yellow gem ("chrysoprase"): - chrysoprase.
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 χρυσόπρασος; click on the second column to search for that grammatical form of the root χρυσόπρασος; click on the third column to search for that word and grammatical form; click on the total to search for the root χρυσόπρασος.