Of an intercellular space in plant tissue: formed by the spontaneous mechanical rupture of cells.
Origin
Late 19th century; earliest use found in Encyclopaedia Britannica. From German rhexigen (A. de BaryVergleichende Anat. der Vegetationsorgane der Phanerogamen u. Farnei. vii. 209; from ancient Greek ῥῆξις action or fact of breaking + German -gen: see -genous) + -ous.