gnomonologyn.
Etymology: < gnomon n. + -ology comb. form.Previous versions of the OED give the stress as: gnomoˈnology.
rare. Apparently only attested in dictionaries or glossaries.
1775 in J. Ash ; and in later Dicts.
This entry has not yet been fully updated (first published 1900; most recently modified version published online June 2021).