PERIDERM

n. Pe2r'i2-du5rm. Lat., periderm a, periderm is (from irepi, around, and e>fxa, the skin). Fr., periderme. 1. The' hard cuticular layer developed by the ccenosarc of certain Hydrozoa. [B, 28 (a. 27).] 2. Of Mohl, the outer tough layers of cork on the stem of a plant as distinguished from soft cork (now applied to the continuous layers of cork considered collectively). IB, 19,77, 229, 291 (a, 35).] [s. 238]