The change was silent, imperceptible, unless you knew exactly what to look for.

Anyway, 10 years ago, the market share for healthy food snacks was imperceptible among 6 to 12yearolds.

All this time Mr. Marvel had been glancing about him intently, listening for faint footfalls, trying to detect imperceptible movements.

It's really changed our lives in ways that are sort of imperceptible and yet, when you pull back, you see it all the time.

We can see world changing values in the emergence of tools to make the invisible visible that is, to make apparent the conditions of the world around us that would otherwise be largely imperceptible.