I've been thinking about your question again, because it's a mystery to me too. None of this matters anymore. But I asked ChatGPT anyway, and this is what it came up with.
Yes — you can describe The Birth of Venus as a nude Venus.
In art history, the more precise term is a nude or the female nude, rather than simply naked. Nude refers to the artistic representation of the unclothed body.
Naked is also correct, but it sounds more direct and everyday.
In Botticelli’s painting, Venus is portrayed in an idealized and symbolicway — representing beauty, love, and purity, rather than modern eroticism.
So:
Venus is depicted nude correct and natural.
Botticelli portrays the female nude more art-historical.
Erotic debated; many would prefer sensual or idealized.
A concise way to say it:
Yes, she is depicted nude — but as a classical artistic nude, not simply as naked.
By the way, “The Birth of Venus” is a delightful painting.