lineellinenlineaarinen
lineellinenlineaarinen is a term that appears to be a misspelling or a portmanteau. The word "lineaarinen" is Finnish for "linear." The repetition of "lineaarinen" or the combination with "lineellinen," which is not a standard Finnish word, suggests a potential error in transcription or a neologism.
In mathematics, "linear" describes relationships where change in output is directly proportional to change in input.
The term "lineellinenlineaarinen" might arise in contexts where a user is attempting to emphasize the linear