A perpetual motion machine would have to be frictionless.    From Wordnet, Princeton University. 

PowerReviews unveils an affordable -- and "frictionless" -- solution for small retailers.    From Wordnik.com. Reference

So if you’re interested in frictionless blogging, here are a few tips.    From Wordnik.com.  [Frictionless blogging: Remove the barriers to publishing | Write to Done] Reference

(EBAY Quote) PayPal business, which has been considered the leader in low-cost, so-called frictionless online transactions.    From Wordnik.com. Reference

Zong brings their "frictionless" mobile payment platform to Android.    From Wordnik.com.  [Techmeme] Reference

Young said Socialcast is targeting the SMB market with a "frictionless" offering.    From Wordnik.com.  [InternetNews Realtime News for IT Managers] Reference

MagnaView Fluid will cling directly to magnets and form a small 'frictionless' envelope around them.    From Wordnik.com.  [Netvouz - new bookmarks] Reference

The company strives to make Voice Search a "frictionless" experience for the user, with correct results obtained easily.    From Wordnik.com.  [Techworld.com News] Reference

'frictionless' distribution that the Apple app store provides.    From Wordnik.com.  [Original Signal - The best of Web 2.0] Reference

"frictionless" way, apportioned automatically by the number of times a month the user visits the favorite sites.    From Wordnik.com.  [SteveOuting.com] Reference

If it does possess mass, then it cannot be frictionless.    From Wordnik.com.  [Aether and Gravitation] Reference

All boosted by the frictionless billing that Apple has created in the App Store.    From Wordnik.com.  [For The Future Of The Media Industry, Look In The App Store] Reference

We are to "work in to one another," smoothly, congenially, in a frictionless peace.    From Wordnik.com.  [My Daily Meditation for the Circling Year] Reference

It also may be that frictionless, affable, constant Lachlan is easy to get along with.    From Wordnik.com.  [The Secrets of His Succession] Reference

Because, to the extent that it is frictionless, to that extent it ceases to possess mass.    From Wordnik.com.  [Aether and Gravitation] Reference

Their work had been reduced to a frictionless routine that left them more leisure than at first.    From Wordnik.com.  [Jim Spurling, Fisherman or Making Good] Reference

But with a frictionless Aether such a hypothesis, although correct, was philosophically untenable.    From Wordnik.com.  [Aether and Gravitation] Reference

In the all but frictionless void, they could go on turning for decades, without additional impetus.    From Wordnik.com.  [The Planet Strappers] Reference

We will therefore consider the problem of the existence of a frictionless medium from the philosophical standpoint.    From Wordnik.com.  [Aether and Gravitation] Reference

But a frictionless medium was absolutely imperative to the success of the Newtonian aspect of the Law of Gravitation.    From Wordnik.com.  [Aether and Gravitation] Reference

That range is reflected — and, more important, is made frictionless — on Argue's debut record, "Infernal Machines.".    From Wordnik.com.  [Jazz Standards That Aren’t] Reference

Much of the steady frictionless movement of the whole department depends on the administrative talent of the Comptroller.    From Wordnik.com.  [Policing the Plains Being the Real-Life Record of the Famous North-West Mounted Police] Reference

It is logically impossible to reconcile a frictionless aether, with their results relative to the pressure of light waves.    From Wordnik.com.  [Aether and Gravitation] Reference

What is the testimony of our own personal observation and experiments to such an impossible entity as a frictionless medium?.    From Wordnik.com.  [Aether and Gravitation] Reference

I have already shown that a frictionless medium is opposed to all philosophy and experience, and is an anomaly in the universe.    From Wordnik.com.  [Aether and Gravitation] Reference

That is, there are no frictionless materials, no perfect insulators, no perfect conductors, no perfectly elastic materials, etc.    From Wordnik.com.  [Biophysical economics] Reference

Basically – building a successful Web 2.0 community requires making the experience as frictionless as possible for the members.    From Wordnik.com.  [Imeem Blocked From MySpace. Who’s Next?] Reference

Business gurus, technological forecasters and cultural critics alike pontificated on the new era of “frictionless capitalism.”.    From Wordnik.com.  [Great Transition~ History of the Future] Reference

Gravitation has been outstanding, while the world has held the conception that Aether is a gravitationless and frictionless medium.    From Wordnik.com.  [Aether and Gravitation] Reference

EBay support has become a compelling in­dustry because it turns out there's a lot of friction in this supposedly frictionless model.    From Wordnik.com.  [My eBay Job] Reference

And for all of these reasons, liking, commenting and conversational back-and-forth actions are becoming more frictionless by the day.    From Wordnik.com.  [The Facebook Double Whammy] Reference

Actually, they stick to pretty much anything, solving the problem of how to hold onto hip yet frictionless black plastic gadget casings.    From Wordnik.com.  [Get A Grip On Technology] Reference

The frictionless functioning of this whole system is effected by everyone adhering to the rites, which prescribe every important action.    From Wordnik.com.  [A History of China] Reference

Therefore, if the frictionless Aether, which possesses no mass and weight, is to be condensed into gaseous or solid matter, there must come.    From Wordnik.com.  [Aether and Gravitation] Reference

These days no product embodies the ruthless, near-frictionless manufacturing machine of global capitalism more perfectly than the flat-panel TV.    From Wordnik.com.  [The Graduate Moves On] Reference

They got the word immediately, but to the old man's dismay, Travis's mare shot away like a scared doe, trotting as frictionless as a glazed emery wheel.    From Wordnik.com.  [The Bishop of Cottontown A Story of the Southern Cotton Mills] Reference

The crux of the whole matter, therefore, lies in the problem as to whether there is, or there is not, in existence, such a thing as a frictionless medium.    From Wordnik.com.  [Aether and Gravitation] Reference

With the present conception of a frictionless Aether, however, it is philosophically impossible for the Aether to exert force on any body that may exist in it.    From Wordnik.com.  [Aether and Gravitation] Reference