What does lacunar mean?
“Lacunar” is an adjective meaning that something has gaps, cavities, or hollow spaces within its structure. The word is especially common in anatomical and biological descriptions, where it identifies tissues or bones containing small spaces called lacunae, but it can also describe porous geological formations, architectural designs, or other structures. Its tone is formal and technical, so “lacunar” often conveys a more exact, specialist idea than the general words “hollow” or “porous.” In general writing, the noun “lacuna” is more familiar: it names an individual gap or cavity, whereas “lacunar” describes the characteristic arrangement or presence of these spaces. The term ultimately comes from Latin, where lacuna means a hole, pit, or missing space.
adjectiveHaving gaps, cavities, or spaces within a structure; especially, containing or consisting of small hollow spaces. In anatomy, it means relating to or forming a lacuna.
- Having gaps, cavities, or spaces within a structure
- Of or relating to a lacuna, especially in anatomical or geological contexts
"The specimen showed a lacunar structure, with numerous small cavities throughout its tissue."
"The porous material had a distinctly lacunar internal structure."
"In the anatomical description, the term lacunar referred to the small spaces between the trabeculae."
From the Latin for a gap or pit, “lacunar” gives a precise name to the hidden cavities that make some structures surprisingly hollow.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does lacunar come from?
“Lacunar” derives from the Latin adjective lacunaris, meaning “full of holes or pits,” which in turn comes from lacuna, a cavity or gap. The Latin root also underlies English words such as “lacuna,” “lacunary,” and “lagoon,” reflecting the shared idea of a hollow or depression. The English adjective entered scholarly usage as a technical term for structures containing spaces or cavities.
Related word forms
How lacunar is actually used
“Lacunar” is a formal and relatively uncommon term, used especially in anatomy, biology, geology, and architecture. It is more precise than simply saying “hollow” or “full of spaces.”
Easily confused with lacunar
“Lacunar” describes a structure containing cavities or gaps, whereas “lunar” relates to the moon or to crescent shapes.
“Lacuna” is a noun meaning a gap or missing space, while “lacunar” is the adjective describing something characterized by such gaps.