1) that which has been born or begotten
1a) the offspring or progeny of men or animals
1b) the fruits of the earth, the produce of agriculture
Part of Speech: noun neuter
Citing in TDNT: 1:672, 114
From G1080; offspring; by analogy produce (literally or figuratively): - fruit, generation.
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 γέννημα; click on the second column to search for that grammatical form of the root γέννημα; click on the third column to search for that word and grammatical form; click on the total to search for the root γέννημα.