While on stage at Vanity Fair’sNew Establishment Summit, Elon Musk addressed his secretive plans to “unveil the D.” Musk, the C.E.O. of SpaceX and Tesla, said that he could give “one clue.”

“One of the things is already there, and people just don’t realize it,” Musk said while in conversation with the Aspen Institute’s Walter Isaacson.

“So we just need to turn it on?” Isaacson asked.

“Right” Musk replied. “The Internet is very good at guessing these things. [They’re] directionally connect, but the magnitude is not appreciated yet.”

One week prior to his appearance at the summit, Musk took to Twitter to announce that it was “about time to unveil the D and something else.” That tweet sent the stock price of Tesla up about 3 percent, and, because of its accidental connotation, inspired countless parodies.

A consensus among those sharing pre-announcement speculation is that “the D” would be a different, perhaps dual-engine model of Tesla. If so, the D would join the S, which is already available, and an already announced S.U.V. model expected next year.

“I love the Internet,” Musk tweeted, after realizing the subtext of his earlier statement. “Comments had me literally R.O.F.L. No, it wasn’t intentional. Glad I didn’t mention the other letter!”

“I kind of dug my own grave on that front,” Musk said on Wednesday, noting that he had tried to trademark the Model E name, which, along with the Model S and Model X, would have completed a trio of automobiles.

“I can’t wait for that quote to get out there: ‘I’m ready to unveil the D, and it’s better and faster,’” Musk joked.

About time to unveil the D and something else pic.twitter.com/qp23yi59i6

— Elon Musk (@elonmusk) October 2, 2014