Stedním
Stedním is a term that appears in some texts but does not have a widely recognized meaning in standard reference works. It is not listed as an independent word in major Czech or Slovak dictionaries, and there is no established definition in general linguistic descriptions. The rarity and inconsistency of its occurrences suggest that stedním is most plausibly a nonstandard, dialectal, or typographical variant of a related word rather than a distinct lexical item.
Most likely, stedním is a misspelling or misprint of středním, the instrumental singular of střední, the adjective
Because there is no reliable, widely cited usage, stedním should be treated as uncertified. When encountered,
Related terms include střední (Czech) and stredný (Slovak), which share the same semantic root related to "middle"