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subtopic

1 ENTRIES FOUND:
subtopic /ˈsʌbˌtɑːpɪk/ noun
plural subtopics
subtopic
/ˈsʌbˌtɑːpɪk/
noun
plural subtopics
Britannica Dictionary definition of SUBTOPIC
[count]
: a topic that is one of the parts or divisions of the main topic of a piece of writing