amoeba (English)

Where does "amoeba" come from?

The word 'amoeba' traces back to the Proto-Indo-European root *h₂meygʷ-, meaning to change or exchange. This evolved into the Ancient Greek term 'amoibē,' which described the act of changing, and was eventually adopted into English to perfectly capture the constantly shifting shape of these unicellular organisms.

Full etymology tree

• amoeba (English), 'A member of the genus Amoeba of unicellular protozoa that moves by means of temporary projections called pseudopodia.'
  • derived ἀμοιβή (amoibḗ) (Ancient Greek), 'requital, recompense'
    • deverbal ἀμείβω (ameíbō) (Ancient Greek), 'to exchange'
      • inherited *h₂meygʷ- (Proto-Indo-European), 'to change, exchange'
        • derived *h₂mey- (Proto-Indo-European)
    • suffix -η (-ē) (Ancient Greek), 'suffix of nouns in the first declension.'

Direct ancestors

• ἀμοιβή (Ancient Greek)

Updated July 2026

Etymology data from Wiktionary, CC BY-SA 4.0 · About Miraris