1) a little horn
2) the name of the fruit, Ceratonia silqua or carobtree (called also John's Bread [from the notion that its pods, which resemble those of the "locust", constituted the food of the Baptist]. This fruit was shaped like a horn and has a sweet taste; it was and is used not only for fattening swine, but as an article of food by the lower classes.
Part of Speech: noun neuter
Neuter of a presumed derivative of G2768; something horned, that is, (specifically) the pod of the carob tree: - husk.
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 κεράτιον; click on the second column to search for that grammatical form of the root κεράτιον; click on the third column to search for that word and grammatical form; click on the total to search for the root κεράτιον.