litteät

Litteät is the plural attributive form of the Finnish adjective litteä, meaning flat, even, or smooth. In standard Finnish, adjectives inflect for number and case, and litteät is used directly before plural nouns such as pinnat (surfaces), reunat (edges), or osat (parts) to describe their flatness or planarity. The form is common in technical writing, industrial quality control, and architectural descriptions where surface geometry is specified.

In Finnish, there is also a related noun, litteys, which denotes flatness or the property of being flat. The concept of flatness is addressed in engineering and design contexts alongside other geometric tolerances. When discussing specifications, Finnish sources may reference litteät pinnat or litteys to convey the requirement that a feature be level or smooth to a defined degree.

As a grammatical form, litteät does not function as a standalone technical term in English-language discourse. Translations typically render the phrase as flat surfaces or describe the property as flatness or planarity. For non-Finnish readers, litteät pinnat would be best understood as “flat surfaces,” with the underlying concept of litteä captured by the terms flatness or planarity in technical practice. The usage of litteät is thus primarily linguistic, tied to Finnish-language descriptions of surface geometry.