Trielemental

The armed forces themselves were to be cartelized in Prussian-type "trielemental" groups—ground forces, air forces and naval forces.

Source: wiktionary

Seizure of these two places lay well within the capabilities of our available forces, and together they would provide a firm trielemental base for further operations by land, sea, and air forces in the direction of Rabaul, New Britain, the Japanese base dominating the entire area.

Source: wiktionary

Generally, MXenes were synthesized by the chemical etching method where chemical etching agents were used to etch off one of layers within ABC-type trielemental layered compounds.

Source: wiktionary