amoe·​ba | \ ə-ˈmē-bə How to pronounce amoeba (audio) \
variants: or less commonly
plural amoebas or amoebae also amebas or amebae\ ə-​ˈmē-​(ˌ)bē How to pronounce amoeba (audio) \

Definition of amoeba

: any of a large genus (Amoeba) of naked rhizopod protozoans with lobed and never anastomosing pseudopodia, without permanent organelles or supporting structures, and of wide distribution in fresh and salt water and moist terrestrial environments broadly : a naked rhizopod or other amoeboid protozoan

Illustration of amoeba

Illustration of amoeba

amoeba: 1 pseudopodium, 2 nucleus, 3 contractile vacuole, 4 food vacuole

Other Words from amoeba

amoebic or less commonly amebic \ ə-​ˈmē-​bik \ adjective

Examples of amoeba in a Sentence

Recent Examples on the Web The family of a child who died this month from a rare infection caused by an amoeba likely contracted at an Arlington splash pad has retained an attorney, city officials said Tuesday. Sarah Bahari, Dallas News, 28 Sep. 2021 After Bakari's death, the Centers for Disease Control and Prevention found the amoeba in water samples collected from the city splash pad Bakari visited. Chron, 31 Mar. 2022 The county health department started an investigation and determined two possible sources for the exposure to the amoeba -- the family's home in Tarrant County and the Don Misenhimer Park splash pad in Arlington. Hannah Sarisohn, CNN, 31 Mar. 2022 Bakari likely contracted the rare amoeba at the Don Misenhimer Park water feature, the agency said. Washington Post, 5 Oct. 2021 How might the amoeba have been present at the splash pad? Sarah Bahari, Dallas News, 28 Sep. 2021 By the end of the year, Winter, his boyfriend and co-founder, Franki Peroff, and creative editor Trevor Padoll were tufting full-time as Mush Studios, making rugs with signature amoeba-like shapes that pulse with waves of brash, offbeat color. New York Times, 6 Jan. 2022 City officials said the Centers for Disease Control and Prevention confirmed the presence of the amoeba in water samples from the Don Misenhimer Park splash pad on Friday. NBC News, 28 Sep. 2021 North Carolina child dies of rare infection caused by 'brain-eating' amoeba. Laura L. Davis, USA TODAY, 18 Aug. 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'amoeba.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of amoeba

1822, in the meaning defined above

History and Etymology for amoeba

New Latin, genus name, from Greek amoibē change, from ameibein to change — more at migrate

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Dictionary Entries Near amoeba



amoeba disease

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Statistics for amoeba

Last Updated

19 May 2022

Cite this Entry

“Amoeba.” Dictionary, Merriam-Webster, Accessed 27 May. 2022.

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More Definitions for amoeba


amoe·​ba | \ ə-ˈmē-bə How to pronounce amoeba (audio) \
plural amoebas or amoebae\ -​bē \

Kids Definition of amoeba

: a tiny water animal that is a single cell which flows about and takes in food


amoe·​ba | \ ə-ˈmē-bə \

Medical Definition of amoeba

1 capitalized : a large genus of naked rhizopod protozoans that have lobed and never anastomosing pseudopodia and are widely distributed in fresh and salt water and moist terrestrial environments
2 also ameba plural amoebas or amoebae\ -​(ˌ)bē How to pronounce amoeba (audio) \ also amebas or amebae : a protozoan of the genus Amoeba broadly : an amoeboid protozoan (as a naked rhizopod)

Other Words from amoeba

amebic or amoebic \ -​bik How to pronounce amoeba (audio) \ adjective

More from Merriam-Webster on amoeba

Nglish: Translation of amoeba for Spanish Speakers Encyclopedia article about amoeba


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