Dekadische

Dekadische is the inflected form of the German adjective dekadisch. The base term derives from the Greek deka- meaning ten and is used in German to refer to concepts connected with decimal notation or decadal time periods. In modern usage, the decimal sense is often expressed with dezimal or dezimalzahl, but dekadisch can still be found in technical or historical texts.

In grammar, dekadische appears as an adjective ending that agrees with feminine singular nouns and with plural nouns in many cases. For example: die dekadische Zahl (the decimal/decadic number), eine dekadische Schreibweise (a decimal notation), mehrere dekadische Zahlen (several decimal numbers). The form also appears in the plural as die dekadischen Zahlen. The precise endings depend on the article and the case, but dekadische commonly marks feminine singular and plural forms.

Usage and nuance: dekadisch historically described things related to base-10 numeration or to a ten-year or ten-day period, depending on context. In contemporary mathematical language, dezimal or dezimalsystem is more standard for base-10 representations, while dekadisch may appear in older literature, specialized jargon, or stylistic contexts to emphasize a decimal relation. For temporal senses, terms like decadal or dekadisk in other languages are more common, with dekadische used primarily in German.

Related terms include dezimal, decimal notation, and dezimalsystem, which are the current, widely used terms for base-10 concepts. Dekadische remains a grammatically correct inflected form tied to the adjective dekadisch, chiefly in contexts describing feminine nouns or plural nouns.