Stichwort -- literally, stab-word or sting-word, is common in German, but it's hard to define. Originally, it refers to the words on the top of the pages of dictionaries which show the reader about where they are in the alphabet. Now it's also used as to sum up the general theme of a conversation, as in: 'Dann haben sie haben sie eine halbe Stunde lang über die Gaza-Krise diskutiert -- Stichwort Menschenrechte' 'Then they discussed the Gaza crisis for half an hour -- the main topic being human rights.' It also is used for search term or rubric -- i.e. you might search a health website for articles related to the Stichwort asthma.
So far, so dull. But here's the sort-of-interesting part. When I was learning German, many German friends asked me what the English word for Stichwort was. They would point to the word at the top of a dictionary page and say 'That's a Stichwort. Surely there must be an English word for something that's so common.'
I had zilch. bupkis. NFC.
Before you laugh at my ignorance, do you know what the English word for a Stichwort in a dictionary is? No, you don't. It's not 'heading' or anything like that. It's a very specific word for just this concept, and I bet ya don't know it. Answer after the jump.