Lacuna (noun)
lacuna [luh-kyoo-nuh]

noun, plural lacunae [luh-kyoo-nee], lacunas.
1. a gap or missing part, as in a manuscript, series, or logical argument; hiatus.
2. Anatomy. one of the numerous minute cavities in the substance of bone, supposed to contain nucleate cells.
3. Botany. an air space in the cellular tissue of plants.

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Origin: 1655-65; < Latin lacūna ditch, pit, hole, gap, deficiency, akin to lacus vat, lake1. Cf. lagoon

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