However it can be useful in the tropical pond or terrarium though needs restriction as it can grow and propagate quickly under good conditions.

Researchers believe that these were decisive factors in allowing the virus to propagate quickly.

During her bedridden years, she also did pioneering work in the field of hospital planning, and her work propagated quickly across Britain and the world.

The pain quickly propagated to her upper chest and into her heart.

Mr. Johansen posted the program on his personal Web site, and it propagated quickly.

"You have a system where the consequence of what appear to be relatively minor failures quickly propagate into catastrophe," he said.

"Internet memes" propagate quickly among users using email, websites, blogs, discussion boards and other Internet communications as a medium.

Kombucha, a white, gelatinous blob about 12 inches in diameter that propagates quickly, has spread like a new-age chain letter in recent months.

A news item in the media, a quickly propagating email, or a link from a popular site may cause such a boost in visitors (sometimes called a flash crowd or the Slashdot effect).

It propagated too quickly and too uncontrollably, so she wrote it off, and confined the strain to cold storage.