What does amebae mean?
Amebae is the plural of 'ameba', a simplified American spelling of 'amoeba' — the familiar name for single-celled organisms famous for their constantly shifting, blob-like bodies. Each ameba moves and captures food by extending pseudopodia, temporary bulges of cytoplasm that flow outward and pull the rest of the cell along. Found in freshwater, seawater, soil, and inside other organisms as parasites, amebae are among the simplest forms of life yet remarkably adaptable. The word derives from Greek 'amoibē', meaning 'change' or 'exchange', a fitting root for creatures defined by perpetual transformation. In everyday usage, 'amebae' appears mostly in biology education, microscopy, and medical writing about parasitic infections such as amebiasis. Because the singular 'ameba' and its plural are used mainly in American scientific literature, readers will more commonly encounter the spelling 'amoebae' elsewhere, though both refer to exactly the same organisms.
nounAmebae is the plural form of 'ameba' (also spelled 'amoeba'), referring to single-celled organisms that move and feed by means of temporary projections of their cytoplasm called pseudopodia.
- Plural of ameba: multiple single-celled organisms of the phylum Amoebozoa (or similar) that move and feed using pseudopodia.
- Loosely, any shapeless, constantly changing microscopic organisms resembling amebas.
"Under the microscope, the amebae extended their pseudopodia and slowly engulfed the algae cells."
"Pond water teems with amebae, visible only when magnified several hundred times."
"Some parasitic amebae, such as Entamoeba histolytica, can cause serious intestinal disease in humans."
'Amebae' is itself a plural form; the singular is 'ameba'. An alternative plural 'amebas' is also accepted in American English.
"Several species of parasitic amebae infect the human digestive tract."
The word comes from Greek 'amoibē' meaning 'change' — fitting for an organism whose entire body constantly reshapes itself to move and eat.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of amebae
The word traces back to the Greek 'amoibē', meaning 'change' or 'exchange', which was combined with '-bios' (life) in the modern scientific genus name Amoeba coined in the 19th century. The simplified spelling 'ameba' arose as an American adaptation of the Greek-derived 'amoeba', and 'amebae' is simply its plural. Related terms sharing this root include 'amebic' (relating to amebas) and 'amebiasis' (infection by parasitic amebas).
Related word forms
How amebae is actually used
The spelling 'ameba' (and its plural 'amebae') is chiefly American, favored in some medical and microbiological contexts; British and general scientific usage more often uses 'amoeba'/'amoebae'. In scientific writing, 'amebae' refers to the organisms collectively rather than to any one species.
Easily confused with amebae
'Amoeba' and 'ameba' are alternative spellings of the same organism — 'amoeba' reflects the original Greek-derived spelling while 'ameba' is a simplified American variant — so 'amebae' and 'amoebae' are simply the corresponding plurals.