Below are possible answers for the crossword clue Efficiency symbol, in phy.
3 letter answer(s) to efficiency symbol, in phy
ETA
a terrorist organization organized in 1959 by student activists who were dissatisfied with the moderate nationalism of the traditional Basque party; want to create an independent homeland in Spain's western Pyrenees; "in 1968 ETA launched a campaign of political assassinations of government officials"
the 7th letter of the Greek alphabet
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