2011, Theo van den Hout,The Elements of Hittite, page16:
There are two genders:common gender (genus commune, abbreviated: com.) and neuter (genus neutrum, abbreviated: neut.). Thecommon gender combines the masculine and feminine of other Indo-European languages into one.
(grammar) In some languages (e.g.Latin,Lithuanian), a gender applied to a noun that can be either masculine or feminine.