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
amoebicplay or less commonly
Recent Examples of amoeba from the Web
The amoeba is transferred to victims, the CDC reports, through water entering the nose while swimming in warm lakes and rivers.
Water samples taken from the whitewater center after her death tested positive for the amoeba.
The amoeba won't infect a person who drinks or swallows water containing it, and must enter the body through the nose to cause harm.
In June 2016, 18-year-old Lauren Seitz tragically died after contracting a brain-eating amoeba during a visit to a popular North Carolina water park.
The amoeba is commonly found in warm freshwater and soil, according to the Centers for Disease Control and Prevention.
The amoeba can also live in swimming pools that aren't being properly maintained.
The lawsuit says Seitz contracted the amoeba after she was thrown overboard while whitewater rafting at the park.
The scientific term for the amoeba Seitz contracted is primary amebic meningoencephalitis, an infection caused by Naegleria fowleri, which is an organism that does not cause illness if swallowed, but can be fatal if forced up the nose.
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.
AMOEBA Defined for English Language Learners
Definition of amoeba for English Language Learners
: a tiny living thing that consists of a single cell
AMOEBA Defined for Kids
Definition of amoeba for Students
: a tiny water animal that is a single cell which flows about and takes in food
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\ play : a protozoan of the genus Amoeba; broadly : an amoeboid protozoan (as a naked rhizopod)
amoebic\-bik\ play adjective
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