Alatyypeillä

Alatyypeillä is a Finnish word form meaning roughly "with the subtypes" or "by the subtypes" and functions as an inflected case of a noun denoting subtypes. It is used when referring to something that is located on, associated with, distinguished by, or occurs in relation to multiple subtypes. The base noun is alatyypit (subtypes), and alatyypeillä is typically the adessive plural form used to express possession, accompaniment, or a contextual relation (for example, "risk varies with the subtypes").

The term appears most often in scientific, medical, taxonomic, and technical contexts where classification into finer categories is discussed. Examples include epidemiology (differences in outcomes between disease subtypes), biology (traits distributed among subtypes of a species), and data analysis (grouping observations by subtypes). Because Finnish marks grammatical roles with cases, alatyypeillä signals the role of "subtypes" as a contextual or instrumental element of a sentence rather than as the subject.

Related forms include alatyypit (nominative plural), alatyypillä (adessive singular), and alatyypien (genitive plural). Usage follows standard Finnish inflectional patterns, and the exact nuance—possession, accompaniment, or means—depends on syntactic context.