This xkcd comic contains a list of mathematical symbols present in Unicode along with humorous interpretations of what they mean based on their shape. While I recognize a couple of them (disjoint union, power set, is defined as), most of them are symbols I haven’t encountered before.
What do these symbols mean? I’ve tried looking some of them up but the Google search results I’m seeing are largely about the Unicode characters themselves rather than for how they’re used in mathematics.
(Bonus: the caption for the image references U+2A0B, a symbol that’s a superimposed $\sum$ and $\int$ symbol. I’ve never seen this before and am very curious what it means.)
| Codepoint | Symbol | Meaning |
|---|---|---|
| U+29CD | ⧍ | Shark |
| U+23E7 | ⏧ | Traffic Circle |
| U+2A33 | ⨳ | Hashtag |
| U+2A7c | ⩼ | Confused Alligator |
| U+299E | ⦞ | Snack |
| U+2A04 | ⨄ | Drink Refill |
| U+2B48 | ⭈ | Snakes over there |
| U+225D | ≝ | Definitely, for sure |
| U+237C | ⍼ | Larry Potter |
| U+2A50 | ⩐ | Spider caught with a cup and index card |
| U+2A69 | ⩩ | ℍℍ |
| U+2368 | ⍨ | :/ |
| U+2118 | ℘ | Snake |
| U+2AC1 | ⫁ | User experience [sideways] |
| U+232D | ⌭ | Rolling dough between your hands to shape it into a ball |
| U+2A13 | ⨓ | Integral that avoids a bee on the whiteboard |
| U+2A0B | ⨋ | Mathematicians need to calm down |
