the.com/bilateral
Two sides, one agreement — symmetry as diplomacy, biology, and body all at once.
means Involving, affecting, or having two sides, parties, or matching halves.
from From Latin bi- (two) plus latus (side); literally two-sided, assembled in the 1700s.
Body planMost animals share mirror-image left and right halves.
DiplomacyBilateral means two nations; multilateral means many.
Knee surgeryBilateral procedures fix both sides at once.