is: an internationally agreed set of devices and procedures for the measurement of temperature. [P7.2]
is: at the time of writing (August 1995), the latest in an evolving sequence of internationally agreed practical temperature scales. [P7.2]
embodies: the best advice for those who need to calibrate and/or use thermometry which is practical but which is also as close to the Kelvin temperature scale as modern instrumentation will allow. [P7.2]
Copyright 1997, The Open University