"outer layer of cells or outer membrane of a metazoan animal," 1853, from ecto- + -derm. Coined by Prussian embryologist Robert Remak (1815-1865). Related: Ectodermal.
ecotourism
ecru
ecstasy
ecstatic
ecto-
ectoderm
ectomorph
-ectomy
ectopic
ectoplasm
ecu
)window.location='https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=byronic106@yahoo.com&lc=US&item_name=Donation+to +Help+Keep+Etymonline+Free+and+Open&no_note=0&cn=&curency_code=USD&bn=PP-DonationsBF:btn_donateCC_LG.gif:NonHosted'){kind=link}