[Vespasian]

Does anybody know of a modern day equivalent in the form of a searchable symbol database maybe even with a "freehand drawn" image search?

Unicode does not quite cover it because it lacks context and meaning of combined codepoints.

[ranger207]

It's not for everything (it doesn't even have the symbol in the article), but https://detexify.kirelabs.org/classify.html is useful for a lot of math stuff