The growth typically follows an initial stage of either homogeneous or heterogeneous (surface catalyzed) nucleation, unless a "seed" crystal, purposely added to start the growth, was already present.

During this upgrade the school purposely added a large array of subwoofers under the scoreboard to enhance the "feel" of their entrance music (the theme song to "2001: A Space Odyssey).

Purell purposely adds an unpleasant bitter taste to its product to make it undesirable to drink and to discourage ingestion.

In many countries, iodine deficiency is a major public health problem that can be cheaply addressed by purposely adding small amounts of iodine to the sodium chloride salt.

Tracker operators aren't interested in making their trackers simple enforcement tools for the content police, so some popular sites purposely add legitimate, non-infringing addresses to their trackers.

It moved slowly, as if purposely adding to the agony that Picard was feeling as death moved his way.

Noise purposely added for such purposes is called dither; it improves the image perceptually, though it degrades the signal-to-noise ratio.

Service: For this service, as with previous seasons, each chef takes turns at the pass, while Scott and Gloria purposely add errors to the dishes for them to spot.

Whether cigarette makers purposely add the nicotine to their tobacco is less clear, although as viewers acquainted with "Frontline" might expect, the report is not inclined to give the tobacco interests the benefit of any doubt.