Same entry in ps.-Zonaras. The headword is a neuter noun, here in the nominative/accusative singular, derived from a)qroi/zw (alpha 760, alpha 761).
As LSJ's sense II (web address 1), this is a technical term in Epicurus (epsilon 2404) to designate the composite or the whole structure of soul and body (see the significant passage of Letter to Herodotus 64-66 with the comments of Annas 1992, 148-151 and, more recently, Everson, 1999, 545-553; see also Lucretius, 3. 370-395).