Question

vocabulary: reference material
their many definitions

• organized in alphabetical order
• provides the part of speech of the word

glossary - contains a list of words and
definitions located at the back of a textbook

• author provides the definitions of

words that the reader may not know

• only one definition in the context the

word is used
thesaurus - contains a list of synonyms and
antonyms

• synonyms: words with similar meanings
• antonyms: words with opposite

meanings

• a short definition is sometimes

provided
which reference material would you use to find
the definition of an unknown word in a
textbook?
glossary
encyclopedia
thesaurus

Explanation:

The glossary is defined as a list of words and their definitions at the back of a textbook, where the author provides definitions for words readers may not know (in the context of the textbook). An encyclopedia provides general knowledge on various topics, and a thesaurus provides synonyms/antonyms (not primary for definitions of unknown words in a textbook's context). So the glossary is the correct choice.

Answer:

A. glossary