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Mother-of-pearl does not have a plural form; neither does its technical term, nacre.
The two terms refer to the internal layer of some mollusc shells, usually described as mother-of-pearl or nacre when speaking of its use for decorative purposes.
You could certainly refer to mother-of-pearl shells, or nacreous shells, as a plural form.
What else can I help you with?
What is the plural form of do and don't in a sentence?
There is no plural form. Do and Do not are verbs
How do you spell the plural form of him?
The plural form of him, her, or it is them. (objective pronouns)
Plural form of bridge?
Bridges is the plural form of bridge.
What is plural form of is?
The plural form of "is" is "are."
What is the plural form of was?
The plural form of "was" is "were."
What is the plural form of I?
The plural form of "I" is "we."
Plural form of mounth?
The plural form of mouth is mouths. The plural form of month is months. The Mounth is a range of hills in Scotland and does not have a plural form.
Is or are groceries a plural or singular?
"Groceries" is the plural form of "grocery."
What is the plural form for beliefs?
"Beliefs" does not have a plural form, as it is already plural. Beliefs is the plural form of belief.
What is the plural form of that?
The plural form of the demonstrative pronoun 'that' is those.
What is the plural form of trench?
Trenches is the plural form.
What is the plural form of meter?
The plural form is metres.
