From time to time, I come across some unusual mathematical terms. I know something about strange attractors. I also know what Witch of Agnesi is. However, what prompted me to write this question is that I was really perplexed when I read the other day about monstrous moonshine, and this is so far my favorite, out of similar terms.

Some others:

- Cantor dust
- Gabriel’s Horn (also known as Torricelli’s trumpet)
- Koch snowflake
- Knaster–Kuratowski fan (also known as Cantor’s leaky tent or Cantor’s

teepee depending on the presence or absence of the apex; there is also Cantor’s leakiertent)Are there more such unusual terms in mathematics?

Jan 17 update:for fun, word cloud of all terms mentioned here so far:and another, more readable:

**Answer**

I’ve always liked ‘abstract nonsense’.

To quote wikipedia:

Note that referring to an argument as “abstract nonsense” is not supposed to be a derogatory expression, and is actually often a compliment regarding the generality and sophistication of the argument.

**Attribution***Source : Link , Question Author : Community , Answer Author : Community*