Definition from Wiktionary, the free dictionary
The following parameters are obligatory:
1=the genitive form of the noun
g=the gender of the noun. Please enter
The following parameters are optional:
2== the plural of the noun. If the noun has no plural form (and most proper nouns don't), do not use this parameter.
g2=additional gender or plural. If the noun is both masculine and feminine, type
|g=m|g2=f. If the noun is plural, type
|g=f|g2=p, depending on the gender.
g3=If the noun is both masculine and feminine, and if it is also plural, type
head=specifies a different headword. Particularly useful for (idiomatic) phrases, which allow one to link individual words or subphrases.