mittemellan

Etymology
. . According to SO attested since 1420.

Adverb

 * 1) midway (in) between, in the middle, right in between (concretely or abstractly)
 * 2)  a (hidden) object placed neither high nor low
 * °N, °W

Preposition

 * 1) midway (in) between, in the middle between, right in between (concretely or abstractly)

Usage notes
Sometimes used more to add emphasis, like "right in between" as opposed to "between" in English, when the location or the like would be clear regardless.