Also found in: Medical.


utterly free of dirt or impurities
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌʌl trəˈklin)

extremely clean: an ultraclean laboratory.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
These ultraclean step stools and ladders include spring-loaded safety casters that retract under load.
Unlike conventional transistor fabrication, which takes place at elevated temperatures and requires high precision and ultraclean conditions, making fiber transistors is "totally compatible with the weaving process," says Lee.
Calif., has relaunched the UltraClean 15 DNA Purification Kit.
As a result Hazlewood have installed five Slimline Ultraclean pumps as part of the new plant.
Their EUV Reflectometer model LPR 1016 is installed on the Low Defect Deposition system for depositing ultraclean multilayers at LLNL.
Company offers a T-Series positive rotary lobe pump, specially designed for ultraclean processing applications, and an e:Top[TM] Control and Indication Unit for automatic systems control with the company's 700 Series valves and B52 butterfly valves.
According to Mr Connell, Kleenall Sierra delivers ultraclean coolant and very dry swarf without the need for costly disposable filter media or filter aids.
Such new ultraclean high-efficiency systems virtually eliminate the pollutants associated with coal-fired plants built before the 1970s.
Ultraclean air ventilation systems produce a vertically directed flow of filtered ultraclean air from the ceiling to the sterile operating area, also known as laminar airflow.
We are manufacturers of two main products - cleaned gin motes and UltraClean Cotton.
Lidwell OM, Lowbury EJL, Whyte W et al 1982 The effect of ultraclean air in operating rooms on deep sepsis in the joint after total hip or knee replacement; a randomised study British Medical Journal 285 10-14