a single celled eukaryotic organism
Amoeba or ameba is the singular form.
amoebas
Germs that look like amoebas
Amoebas are classified as protists.
Amoebas live because god made them.
The dictionary definition of a word
what is the definition of word-processing package
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a definition of a compound word is jack-ass.
The word that goes with that definition is "door."
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That word has no definition in English.