(Sanskrit अणु) Literally, "atom." The term is used in the general sense for any atom, yet Anu is also a name of "Brahma," the primordial atom.
"The primordial atom, Anu, is the purest atom that enters through the magnetic field of our nose. This atom cannot be multiplied in the pre-genetic or primal-genetic state. It is an omni-gatherer. It is omniscient, omnipresent, a total sum, unlimited and absolutely divine." - Samael Aun Weor, Igneous Rose
"Anu is one of the names of Brahma (as distinct from Brahma neuter), and it means "atom": Aniyamsam aniyasam, "the most atomic of the atomic," the "immutable and imperishable (achyuta) Purushottama." - H.P. Blavatsky, The Secret Doctrine
"Anu is the primordial chaos, the god time and world at once, χρομος and Κοσμος, the uncreated matter issued from the one and fundamental principle of all things." - H.P. Blavatsky, Isis Unveiled