Singular, the plural is "hippopotami" or perhaps "hippopotamuses" - or just hippos.
Straight answer: no. According to AskOxford, the ultimate source of English language questions, the plural of hippopotamus is hippopotamuses.
the plural of hippopotamus is hippopotamus, hippopotamuses, or hippopotami
The form hippopotamus's is a correct possessive form of the singular noun hippopotamus.There are two accepted forms for possessive singular nouns ending in s:Add an apostrophe (') after the existing s at the end of the word: hippopotamus'Add an apostrophe s ('s) after the existing s at the end of the word: hippopotamus's
practitioner is singular (plural practitioners)sofa is singular (plural sofas)satellite is singular (plural satellites)clips is plural (singular clip)dentist is singular (plural dentists)dollars is plural (singular dollar)article is singular (plural articles)magazines is plural (singular magazine)laminator is singular (laminators is plural)radios is plural (singular radio)
singular and plural
Singular: book / Plural: books Singular: cat / Plural: cats Singular: child / Plural: children Singular: foot / Plural: feet
Are is plural. "Is" is singular. For example, "There is a glove on the chair". That is singular. "There are gloves on the chair". That is plural.
"Has" is singular, e.g. He has, she has. "Have" is plural, e.g. They have, we have. The exception is "I" - e.g. I have.
The word team is singular; the plural form is teams.
diagnosis is singular diagnoses is plural sis = singular ses = plural
"Notebook" is singular. The plural form is "notebooks."
Who may be singular or plural.