Briefscript

Briefscript is a term coined by Ray Brown for an engineered language that, at least in written form, has much shorter words than most natural languages. Some briefscripts are also speedtalks, i.e. languages that are also very concise in spoken form.

Speedtalk

The term speedtalk comes from Robert A. Heinlein's 1949 novella, Gulf, and refers to an extremely concise language in which all morphemes are just one word long.