From Longman Dictionary of Contemporary Englishlacunala‧cu‧na /ləˈkuːnə/ noun (plural lacunae /-niː/ or lacunas) [countable] formal TCNa place where something is missing in a piece of writing SYN gap
Examples from the Corpus
lacuna• What I wish to suggest is that filling the structural lacuna makes structured talk without higher-order thought look much less likely.• Let us call this the structural lacuna of the intentional scenario.Origin lacuna (1600-1700) Latin “pool, hole in the ground, empty space” 