Tra từ united states customary system - Từ điển WordNet v3.1

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Từ điển WordNet v3.1 - WordNet Dictionary

United States Customary System

noun

the system of weights and measures based on the foot and pound and second and pint that dates back to colonial America but differs in some respects from the British Imperial System;
today in the United States this system exists side by side with the SI system
• Hypernyms:
system of weights and measures