textbook
US /ˈtekst.bʊk/
UK /ˈtekst.bʊk/

1.
a book used as a standard work for the study of a particular subject
:
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We need to buy a new textbook for our history class.
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The professor recommended this textbook for advanced students.
1.
serving as a model of a particular quality or type
:
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His response was a textbook example of how to handle a crisis.
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It was a textbook performance by the athlete.