Like a “V” with a rounded bottom, or equivalently a “U” that the arms widen at the top.
Nothing from the Greek alphabet.
Live long and Prosper.
A stylized V with a rounded bottom can be used to represent a value in a formula that has another one already represented by a standard V. Say, you have “volume” and “velocity” in the same formula: “Volume” would be represented by a V and “Velocity” by the V/U bastard child.
Where have you seen this?
FWIW,
I don’t think that’s a universal standard-- It might just be what that specific textbook uses. More often, if two quantities happen to be in the same equation, you come up with something on the spot (usually either making one capital and one lowercase, adding subscripts, or using a different letter entirely), and if they’re not in the same equation, you just don’t care and use the same symbol.
That list covers disparate enough topics that it looks like it’s for an entire textbook, and the authors of that textbook apparently decided that they wanted a different symbol for everything, so all equations could be consistent with each other and you could create equations mixing anything at all. Which is certainly a reasonable editorial decision, but it isn’t the usual one.
That’s a lower case nu (Greek letter)
This is what nu looks like: \nu. That doesn’t sound like what the OP is describing.
You snuck in before I posted. I was trying to reply to @Elmer_J.Fudd ‘s cite which was for specific volume
I guess if we had to name it, it would be an upward parabola.
In unicode, there is the symbol ᙀ: Shapecatcher.com: Unicode character information for 'Canadian syllabics carrier zu' (0x1640) from an Canadian aboriginal writing system: The Carrier Syllabics
If that’s not quite the right shape, you can try drawing it yourself at https://shapecatcher.com/ and seeing what it matches
That’s a cool site.
never mind
I tried to post saying that it sounds like some hekshers I’ve seen-- but not exactly like any particular one, and got myself in trouble trying to link to images.
A heksher is a symbol for kosher food.
Anyway, it sounds enough like some I know of, that it could be a symbol of a smaller organization I don’t know of.
Are you talking about an upside-down Omega? ℧
Otherwise, I am not sure what you are describing.
I always knew that the U-in-a-circle meant “kosher” but I wondered what the U literally meant. Now I know it’s not even a U.
ETA: I just now looked it up and it turns out to actually be a U inside an O. It stands for Orthodox Union. Either way, I just learned what it meant.
Short for The Union of Orthodox Jewish Congregations of America.
To be fair, has anyone ever figured that out on their own? After all, the registered trademark symbol isn’t an R inside an O, and the copyright symbol isn’t a C inside an O…