Monocoque? It's a question of precision. Most descriptions of 'monocoque construction' are more precisely and accurately semi-monocoques, unless you are referring to an eggshell. Like using 'propeller' rather than the more accurate 'airscrew', or 'organic' in terms of vegetables, common usage has overtaken accuracy.
It's not hard to find even good technical writing of the 20s and 30s (IIRC) which used monocoque when they meant semi-.