[irregularly f. Gr. ἐκ out + δέρ-ος, δέρ-μα skin.] A term introduced by Prof. Huxley to denote the outer part of the skin and skin-like structures, including the epidermis, the epithelium, and all structures homologous with these. Opposed to ENDERON.
Hence Ecderonic a.
1859. Huxley, in Todd, Cycl. Anat., V. 476/1. The whole external (free) area of metamorphosis I call the Ecderon. Ibid. The ecderonic area of metamorphosis.
