lacunal

[luh-kyoon-l] /ləˈkyun l/
adjective
1.
of or pertaining to a lacuna.
2.
having lacunae.
Also, lacunary
[lak-yoo-ner-ee, luh-kyoo-nuh-ree] /ˈlæk yʊˌnɛr i, ləˈkyu nə ri/ (Show IPA).
Origin
1840-50; lacun(a) + -al1