Search EcteronWord: ecteronEcteron Meanings:The external layer of the skin and mucous membranes; epithelium; ecderon(anatomy) The external layer of the skin and mucous membranes; epithelium; ecderon.ectethmoidecthlipsisecthoreumecthymaecto-ectoblastectobronchiumectocuneriformectocuniformectocyst