a. Bot. [f. Gr. λύσι-ς loosening + -γεν-ής born + -OUS.] Of intercellular spaces: Produced by the breaking down of adjoining cells.
1881. Vines, Prantl’s Elem. Textbk. Bot. (ed. 2), 60. Cavities … which have been formed … by the absorption of a mass of tissue (lysigenous).
1883. Athenæum, 29 Dec., 870/2. The lysigenous origin of the reservoirs of ethereal oil in these plants (Hypericaceæ).
