An enigmatic entry. Adler printed both words as headwords (thus without a gloss); and irrespective of that it is not clear what relationship between them is intended. If this i)tu/s (here only) is accented i)/tus, it does mean the felloe of a wheel or the rim of a shield (iota 755, iota 756) or something else circular. The second word might then be its accusative case (again oddly accented), actually i)/tun in Homer. But for i)te/a as willow tree see under omicroniota 182, omicroniota 183.