Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
altrovorsum, contr. altrorsus, adv. [alter-versum], on the other side, = ab alterā parte: rerum altrovorsum quom meam mecum rationem puto, * Plaut. Cas. 3, 2, 25: pudicissimā illā uxore altrorsus disclusā, App. M. 9, p. 230, 7.