ecto-

From Ancient Greek ἐκτός (ektós, “outside”). Sense 2 ("ghost-related") is a reinterpretation of this prefix in the word ectoplasm (“paranormal substance believed to be involved in the materialization of the dead”), for the etymology of which see there.

• (General American) IPA^(key): /ɛktoʊ-/

• Audio (US):

  (file)

ecto-

1. Outside.

   Synonyms: out-, ex-, exo-

   Antonyms: in-, intra-, en-/em-/im-, end-/endo-/ento-

3. (chiefly in fantasy fiction) Ghost-related.

   ecto-blaster, ectometer

   • For quotations using this term, see Citations:ecto-.

• Ceto, Cote, OTEC, cote

From Ancient Greek ἐκτός (ektós, “outside”).

ecto-

1. ecto-

From Ancient Greek ἐκτός (ektós, “outside”).

ecto-

1. ecto-

• Ceto, Toce, ceto, cote, teco

ecto-

1. ecto-

• “ecto-”, in Dicionário Aulete Digital (in Portuguese), Rio de Janeiro: Lexikon Editora Digital, 2008–2026
• “ecto-”, in Dicionário Priberam da Língua Portuguesa (in Portuguese), Lisbon: Priberam, 2008–2026

ecto-

1. ecto-

• “ecto-”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8.1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025