Sentence:  In March , 1961 , representatives of the national laboratories of <WSD>Australia</WSD> , Canada , The Netherlands , United Kingdom , U. S. S. R. , United States , and West Germany , met at the NBS to devise means for reaching international agreement on a temperature scale between 10 and 90 * * f . 
Meaning of the word marked with <WSD> tags:  a nation occupying the whole of the Australian continent; Aboriginal tribes are thought to have migrated from southeastern Asia 20,000 years ago; first Europeans were British convicts sent there as a penal colony