Macro
Big.
This one has confused me for a long time. I’m familiar with a lot of different uses of this by itself and as a modifier, and have been curious how those uses came from the same source, what’s common between, say, a *macrobiotic diet* and a *keyboard macro*. It’s still vexing that we use a *microscope* to look at small things, and a *macro lens* to take pictures of small things (to be fair, Nikkor does mark their close-focusing lenses «micro»). So anyhow, a *computer macro* is a macroinstruction, or super-high-level instruction, made up of many other conceptually smaller instructions. *Macrobiotic* refers to food choices designed to give us longer lives.