Macrobiotic
Macrobiotic refers to the macrobiota, a region's living organisms (or flora and fauna) large enough to be seen with the naked eye.
However, macro- comes from the Greek 'makros' meaning not only 'large' but also 'long'.
So macrobiotic can also be taken to mean 'long life.' Thus, the idea with a macrobiotic diet is that it is for a long life, that is that the diet will lengthen life