Etymology
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bilateral (adj.)

"having two sides," 1775; see bi- "two" + lateral (adj.). Related: Bilaterally.

updated on May 26, 2017

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Definitions of bilateral from WordNet

bilateral (adj.)
having identical parts on each side of an axis;
Synonyms: isobilateral / bilaterally symmetrical / bilaterally symmetric
bilateral (adj.)
affecting or undertaken by two parties;
a bilateral agreement between the United States and Japan
bilateral (adj.)
having two sides or parts;
Synonyms: two-sided
From wordnet.princeton.edu, not affiliated with etymonline.