/leuh kyooh"neuh/ , n. , pl. lacunae /-nee/ , lacunas .
1. a gap or missing part, as in a manuscript, series, or logical argument; hiatus.
2. Anat. one of the numerous minute cavities in the substance of bone, supposed to contain nucleate cells.
3. Bot. an air space in the cellular tissue of plants.
[ 1655-65; lacuna ditch, pit, hole, gap, deficiency, akin to lacus vat, LAKE 1 . Cf. LAGOON ]