Search also in: Web News Encyclopedia Images. striking 1 adj Something that is striking is very noticeable or unusual. The most striking feature of those statistics is the high proportion of suicides..., He bears a striking resemblance to Lenin. â¦ strikingly adv usu ADV adj In one respect, however, the men really were strikingly similar., ...a strikingly handsome man... 2 adj Someone who is striking is very attractive, in a noticeable way. She was a striking woman with long blonde hair.
cell membrane. the outer boundary of the cytoplasm, a layer that controls what enters and leaves a cell.thin, flexible barrier around a cell, regulates what enters and leaves the cell. cell wall. a protective outer covering that lies just outside the cell membrane of plant cells.
The innermost layer (a one-cell-thick cylinder) of the cortex of a plant root; forms a selective barrier determining which substances pass from the cortex into the vascular tissue. î î î. In plants, the tissue system forming the protective outer covering of leaves, young stems, and young roots.