Optionalalign"end" near a container's right edge, so it opens leftward.
OptionalidUnique per page when the same term shows more than once.
OptionalsideWhere it opens. "bottom" inside a scrolling container (a table), whose top edge would cut it off.
OptionaltermA glossary entry, or your own text with text.
Optionaltext
What a tooltip explains: a glossary term, or your own text.