[1307] octagōnos, on (ὀκτάγωνος), achteckig, turris, Vitr. 1, 6, 4. – subst., octagonon (octogonum), ī, n., das Achteck, Vitr. 1, 6, 4. Gromat. vet. 326, 24 (wo octog.). Boëth. inst. arithm. 2, 15 (wo octog.).