macropinosome

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noun

A large vesicle filled with extracellular fluid and formed through macropinocytosis

OriginEnglish pinosome ← French macro- ← Ancient Greek μᾰκρός (măkrós) →
Scrabble 21
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Meanings

nounmacropinosome (plural macropinosomes)

plural macropinosomes

  1. biologyA large vesicle filled with extracellular fluid and formed through macropinocytosis

Origin

  1. Proto-Indo-European*meh₂ḱ-
  2. Proto-Indo-European*mh₂ḱrós
  3. Proto-Hellenic*makrós
  4. Ancient Greekμᾰκρός (măkrós)
  5. Frenchmacro-
  6. Englishmacro-
  7. Englishpinosome
  8. Englishmacropinosome

From macro- + pinosome.

Full word history & related roots →
Cite this entry
APA

macropinosome. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/macropinosome

MLA

“macropinosome.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/macropinosome. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “macropinosome,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/macropinosome.

Source: macropinosome on Wiktionary, CC BY-SA 4.0.