Gradunza?

No, unfortunately. I also have come across "credenza" about several minutes ago, and guess it's the correct spelling.

I come across the phrase "moss- covered three-handled family gradunza" in a neuroscientific book. Its author have used it to make a comparison.

Thank you so much dear GPY.

In the animated film of Dr. Seuss’ The Cat in the Hat, a “mosscovered three- handled family gradunza” has gone missing. The Cat employs the official- sounding but entirely fictional technique of calculatus eliminatus in order to track it down. According to the Cat, calculatus eliminatus requires identifying all the places the missing object is not. The only remaining location will necessarily have to be where the missing object is. Hardly an efficient approach to locating where you left your car keys.

Nevertheless, early on, this was roughly the approach that scientists had to take with the network Shulman had discovered....

Bahareh MWhat does "gradunza" and actually "family gradunza" mean?

There is no such word. It appears in the TV rendition of Theodore Geisel's incomparable little book The Cat in the Hat. The non-word does not appear in the book, and we never see what it is in the TV program.

I notice that there are also some hits for the spellings "gredunza" and "grudunza", so perhaps some writers just take a guess at how to spell this mangled or made-up word, in the absence of its being written down somewhere definitively. I'm not sure.

There are a lot of fantastical words in the Dr. Seuss books for children. Since the object in question went missing, you have to do as children do, and use your imagination.

https://www.dictionary.com/e/s/fah-who-foraze-the-magical-language-of-dr-seuss-and-the-whos/#the-wit-and-whimsy-of-dr-seuss

That’s because “gradunza” is not actually a word. The word is “credenza”. Someone who listened to a video tried to spell it phonetically, but failed. If you Google “credenza” you’ll find lots of images.