Ecto may refer to:
- Ecto, a medical prefix meaning outer or outside
- Ecto (album), by Happy Rhodes, 1987
- Ecto (software), a weblog client
See also
- All pages with titles beginning with Ecto
- Endo (disambiguation)
- Exo (disambiguation)
- Ectoderm, in biology, the outermost tissue layer
- Ectoplasm (cell biology), the outer part of the cytoplasm
- Ectotherm, in biology, a cold-blooded animal
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