lacuna
/ləˈkjuː.nə/
A small opening; a small pit or depression.
A small blank space; a gap or vacancy; a hiatus.
An absent part, especially in a book or other piece of writing, often referring to an ancient manuscript or similar.
Long lacunae in this inscription make interpretation difficult.
Any gap, break, hole, or lack in a set of things; something missing.
A space visible between cells, allowing free passage of light.
A language gap, which occurs when there is no direct translation in the target language for a lexical term found in the source language.