thesaurusi

Usage notes

 * This word is incorrectly formed. For masculine nouns in the nominative case of Latin’s second declension (of which is one),  and  are singular and plural endings, respectively; one or the other attaches to the noun’s stem, depending on number: the plural ending does not concatenate as  +  +  = , but rather supplants the singular ending  as  +  =  — thus forming the correct Latin nominative plural, which is also valid in English. Alternatively, in English, , can be suffixed with the English plural suffix , to form another correct plural form of , .  is a rare error.