As nouns the difference between lacunas and lacunar
is that lacunas is while lacunar is (architecture) a coffer; a ceiling constructed of coffers.
As an adjective lacunar is
(medicine) of or pertaining to a lacuna.
lacunar
English
Adjective
(-)
(medicine) Of or pertaining to a lacuna
Synonyms
*lacunal
Noun
(
en noun)
(architecture) A coffer; a ceiling constructed of coffers