A unidirectional flow.    From Wordnet, Princeton University. 

Adjective : a unidirectional flow.    From Dictionary.com. 

Although they expect the dollar to fall, analysts at KBC Bank said the recent, nearly "unidirectional" currency trade was troubling.    From Wordnik.com.  [Widespread dollar fall continues as fears about crunch re-emerge] Reference

By demonstrating one-way or "unidirectional" airflow within the lungs of alligators, the new study - published in the Friday, Jan. 15 issue of the journal.    From Wordnik.com.  [EurekAlert! - Breaking News] Reference

Time is linear, it is unidirectional and irreversible.    From Wordnik.com.  [The Idea of Design in Nature: Science or Phenomenology? By Jakob Wolf] Reference

But Turkey cannot have a unidirectional foreign policy.    From Wordnik.com.  [Between East and West] Reference

The physical-mechanical link of causality is unidirectional.    From Wordnik.com.  [The Idea of Design in Nature: Science or Phenomenology? By Jakob Wolf] Reference

I did see that the other day, that this was a unidirectional mike.    From Wordnik.com.  [CNN Transcript Feb 1, 2004] Reference

Time itself, as a phenomenon, is utterly linear and unidirectional.    From Wordnik.com.  [Pastwatch, the Redemtion of Christopher Columbus]

Instead, they'll target that stuff in the usual unidirectional way.    From Wordnik.com.  ["End of the Affair: Barack Obama and the press break up."] Reference

Strong wind generates unidirectional eruption cloud, Mt. Etna, Italy.    From Wordnik.com.  [volcanic ash hazards and ways to minimize them] Reference

Apparently development brings differentiation that is unidirectional.    From Wordnik.com.  [Epigenesis and Preformationism] Reference

Hence any comment you make is likely to become a unidirectional salvo.    From Wordnik.com.  [Kathy Sierra: Randomness and Serendipity] Reference

    "The shielding spell was unidirectional," Telemain put in.    From Wordnik.com.  [Searching for dragons]

Finally last year, Orvis rolled a tube from the unidirectional material.    From Wordnik.com.  [Military Secrets Help Produce the Ultimate Synthetic Fishing Rod] Reference

The release of this energy is a unidirectional and irreversible process.    From Wordnik.com.  [Energy from Fossil Fuels (historical)] Reference

Magic paths typically are unidirectional, and some can be used only once.    From Wordnik.com.  [Isle of View]

Teska is very accomplished for her age, and the meld will be unidirectional.    From Wordnik.com.  [Mind Meld]

Additionally, there was blood coming out of her wounds in a unidirectional manner.    From Wordnik.com.  [CNN Transcript Jun 13, 2006] Reference

Change means unidirectional change ie getting hotter, which is not what change means.    From Wordnik.com.  [On Thursday, the Legg report will be published along with...] Reference

But the power was unidirectional only, for reeling in the wire on the return journey.    From Wordnik.com.  [Fear is the Key]

Other reporters used unidirectional, noise-canceling microphones when in the auditorium.    From Wordnik.com.  [Chip Berlet: Fox and MSNBC Reporters at Values Voters: Rude, Disruptive, Lazy] Reference

Hey CommieCanuck is the bashing sorry, the opinion-giving-exercise unidirectional of what?.    From Wordnik.com.  [Weird Style: Cast-Offs and Bolt-Ons] Reference

This form of accounting captures instances of loop closing, cascading, and unidirectional flows.    From Wordnik.com.  [Industrial symbiosis] Reference

What gives the physical-mechanical link of causality its unidirectional quality is the succession of time.    From Wordnik.com.  [The Idea of Design in Nature: Science or Phenomenology? By Jakob Wolf] Reference

If climate change is persistent and unidirectional for longer than 500 years you see a response at treeline.    From Wordnik.com.  [Bristlecone/Foxtail Site #1: Cirque Peak « Climate Audit] Reference

Under mixed conditions (complex impedances) the unidirectional and oscillating energy flows will superimpose.    From Wordnik.com.  [1. Phasor diagram] Reference

All of these current issues require international cooperation, so our unidirectional style will have to change.    From Wordnik.com.  [Madeleine Albright, Former Secretary of State of where?] Reference

The volcanic ash was blown by strong northwest winds, resulting in a relatively narrow unidirectional ash cloud.    From Wordnik.com.  [volcanic ash hazards and ways to minimize them] Reference

The converse is true, and I have some say in the use of her body; our stewardship is complementary, not unidirectional.    From Wordnik.com.  [Why Most Americans Support Husband Notification] Reference

It is also worth noting that the relationship between mental illness and homelessness is not necessarily unidirectional.    From Wordnik.com.  [Christopher Devine: Of No Fixed Address: Terrorized Around the Clock] Reference

Really the terms "ongoing, unidirectional, and non-cyclical" are a way of reducing literature to the element of "story.".    From Wordnik.com.  [Music] Reference

Is it any better to let Blizzard's coders draw the circle than it is to let unidirectional mass-media producers draw it?.    From Wordnik.com.  [The Drop Kick] Reference

The do not accurately depict real world communications systems, which are not linear and unidirectional, but contain feedback.    From Wordnik.com.  [An Interesting Pattern] Reference

Just as back in the 19th century, the observed migration would mostly be unidirectional influx of new peoples into this country.    From Wordnik.com.  [Coyote Blog » Blog Archive » Illegal Immigration and the Rule of Law] Reference

A unidirectional flow of air produces a scavenging effect leaving the cylinder full of clean air when piston covers inlet air ports.    From Wordnik.com.  [Chapter 6] Reference

Hull materials Balsa and PVC foam with laminates of unidirectional E glass and Kevlar, bonded with epoxy resin at 113 to 122 degrees.    From Wordnik.com.  [Buy Craig Venter's Ultra-Luxurious Lab Yacht Today!] Reference

While traditional links are still configured as unidirectional vectors, they can now become multidirectional with co-links technology.    From Wordnik.com.  [Smart Mobs » Blog Archive » Collaboration is the future of hyperlink creation] Reference

It's a unidirectional process, the line of words I'm creating with my pen moves slowly but steadily forward, across and down the page.    From Wordnik.com.  [Archive 2007-01-01] Reference