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ECS
ECSC
ecstasy
ecstatic
ECT
ectasia
ecto-
ectocommensal
ectoderm
ectogenesis
ectomere
ectomorph
-ectomy
ectoparasite
ectophyte
ectopia
ectopic
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ectoderm
ec·to·derm [ éktə dùrm ]


noun 
Definition:
 
outer layer of an embryo: the outermost of three cell layers of an embryo, from which the epidermis, nervous tissue, and sense organs develop
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