Definition of bilateral
1
: affecting reciprocally two nations or parties
a bilateral treaty a bilateral trade agreement
2
: having two sides
dealing with a bilateral problem
3
biology
a
: of, relating to, or affecting the right and left sides of the body or the right and left members of paired organs
bilateral nephrectomy
b
: having bilateral symmetry
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Merriam-Webster unabridged
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Time Traveler for bilateral
The first known use of bilateral was in 1751
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