Another theme week -- following on 'all' prefixes with 'large' prefixes, and following on the universe with the:
macrocosm (MAK-ruh-koz-uhm) - n., the universe considered as a whole; the total or entire complex structure of something; a complex structure, such as a society, considered as a single entity that contains numerous similar, smaller-scale structures.
Coined in Medieval Latin (and taken into English via French around 1600) from Ancient Greek roots makrós, large/long/far + kósmos, the universe -- which sounds like a redundancy: The universe already contains all, so why additionally specify that it's large? That last sense is the key one, as philosophers needed words for the concepts of macrocosm and microcosm, that the whole is reflected in its parts -- that as on earth so in heaven, and that there's correspondences between, for example, the human body and the heavens:
Thanks, WikiMedia! This is a very common concept in ancient philosophies worldwide, including Ancient Greece, and theorizing about it continued in the European Middle Ages and Renaissance. Other words with macro- include macrobiotic ("prolonging life") and macrometer ("large/long measurement"). (I was going to use macron, but that's not a prefix but rather noun use of the neuter of makrós, and not prefixing anything.)
---L.