[issue32289] Glossary does not define "extended slicing"

New submission from Steven D'Aprano steve+python@pearwood.info:
Looking at issue 32288, I realised that the glossary doesn't define "extended slicing" or "extended slice", even though they are common terms. Although I thought I know what they meant, on closer reflection I realised I wasn't sure.
Does extended slicing refer to slice *objects* with a stride/step, as opposed to slice objects all the way back in Python 1.3 (yes, *one* point 3) that only had start and end?
Does it refer specifically to the two-colon form of slice *syntax*?
Both? Neither?
https://docs.python.org/3/glossary.html#term-slice
The only documentation I found is from the 2.3 What's New:
https://docs.python.org/2.3/whatsnew/section-slices.html
---------- assignee: docs@python components: Documentation messages: 308125 nosy: Massimiliano Culpo, docs@python, steven.daprano priority: normal severity: normal status: open title: Glossary does not define "extended slicing" type: enhancement
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participants (1)
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Steven D'Aprano