desimaalisiin

Desimaalisiin is a Finnish inflected form of the adjective desimaalinen, meaning decimal. It is the illative plural form, used when the noun it modifies is in the illative case and refers to movement toward or into decimal numbers or decimal systems, for example desimaalisiin lukuihin or desimaalisiin järjestelmiin. The form is created from the stem desimaal- plus the plural illative suffix -iin, yielding desimaalisiin.

In mathematical, educational, and computing contexts, desimaalisiin appears in phrases describing decimal numbers, decimal systems, or decimal-related concepts. It functions as a grammatical modifier rather than as a separate concept. Related noun forms include desimaaliluku (decimal number), desimaalijärjestelmä (decimal system), and desimaalipilkku (decimal point). When the noun is in singular or a different case, other forms of the adjective are used, such as desimaalinen luku (a decimal number) or desimaalisen luvun (the decimal number’s).

Notes on usage: desimaalisiin is specifically the illative plural form, used with plural nouns in the illative case. Its appearance signals movement toward or into several decimal objects or concepts. The term is commonly encountered in Finnish discussions of base-10 notation, digital computation, and numerical representation, where precise agreement between adjective and noun is required.