Ulkoreunojen

Ulkoreunojen is the genitive plural form of ulkoreuna, a Finnish noun meaning the outer edge or outer boundary of an object, area, or system. The expression is used in Finnish texts to refer to the edges that lie on the outside of something, as opposed to internal or inner features.

In practice, ulkoreunojen is a descriptive phrase rather than a fixed technical term with a single, universal definition. It appears across disciplines where margins or exterior outlines are relevant, such as geometry and cartography for describing the outer boundary of shapes or maps, in architecture for discussing the external limits of a structure, or in biology and botany to refer to the outer margins of leaves or petals. The exact meaning depends on context, and more specialized terminology may be preferred in formal scholarly work.

Etymology and morphology: the word is built from ulko- (“outer”) and reuna (“edge” or “boundary”). The form ulkoreunojen is used when speaking about the outer edges in a possessive sense or in phrases that require a genitive plural construction.

Related terms and concepts include ulkoreuna (the singular outer edge), reuna (edge or boundary), and, in broader discussions, concepts such as boundary, margin, perimeter, and outline. In Finnish-language technical writing, precise terms specific to a field may replace descriptive phrases like ulkoreunojen when a formal definition is required.

See also: ulkoreuna, reuna, rajat, ääriviiva.