From Wiktionary, the free dictionary
From octo- + -n- + ocular.
octonocular (not comparable)
- Having eight eyes.
1745, Richard Mead, A mechanical account of poisons, page 102:The Tarantula (d) is a Spider of Apulia, of the octonocular kind […]
1815, Cotton Mather, The Christian Philosopher, page 158:Spiders are mostly octonocular […]