To pivot is, essentially, to fail gracefully. While the term has been in the start-up lexicon for decades, it is coming up more often in the current Internet boom, as entrepreneurs find that many investors are willing to keep the money flowing even if a start-up takes a hard left turn.

“Ideas are like lightning in a bottle, so if the company is small enough and didn’t seem to capture lightning on their first try, it makes sense to try again,” said Ben Horowitz, one of the founders of the venture capital firm Andreessen Horowitz. “The art of the pivot is to do it fast and early. The older and bigger the business, the harder it is to change directions.”

Mr. Horowitz speaks from experience: A decade ago, he went through a pivot of Loudcloud, a publicly traded enterprise services firm that he founded with Marc Andreessen, into Opsware, a networking software company. “That was very public and very scary,” he said. “We dropped down to 35 cents on the Nasdaq, and although we went back up to $14, it took awhile. When you’re a small company, no one really notices if you make a big change.”