Sui generis
Sui generis (; ) is a Latin phrase that means "of its (his, her, their) own kind; in a class by itself; unique."
Sancus
According to ancient Latin sources the meaning of the term "semones" would denote "semihomines" (also explained as "se-homines", men separated from ordinary ones, who have left their human condition: prefix "se-" both in Latin and Greek may denote segregation), or the "dii medioxumi", i.e. gods of the second rank, or semigods, entities that belong to the intermediate sphere between gods and men. The relationship of these entities to "Semo Sancus" is comparable to that of the "genii" to "Genius Iovialis": as among the "genii" there is a "Genius Iovialis", thus similarly among the "semones" there is a "Semo Sancus". The "semones" would then be a class of semigods, i.e. people who did not share the destiny of ordinary mortals even though they were not admitted to Heaven, such as Faunus, Priapus, Picus, the Silvani. However some scholars opine such a definition is wrong and the "semones" are spirits of nature, representing the generative power hidden in seeds. In ancient times only offers of milks were allowed to the "semones".