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from The American Heritage® Dictionary of the English Language, 4th Edition

  • Outer; external: ectoparasite.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • outside

from the GNU version of the Collaborative International Dictionary of English

  • See ect-.

from The Century Dictionary and Cyclopedia

  • A prefix in words (chiefly biological) of Greek origin, signifying ‘outside, without, outer, external, lying upon’: as, ectoderm, the outer skin; Ectozoa, external parasites: opposed to endo-, ento-.


Late Greek ekto-, from ektos, outside, from ek, ek-, out; see eghs in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From the Ancient Greek ἐκτός (ektos, "outside"). (Wiktionary)


Sorry, no example sentences found.


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