Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Having or formed of two sides; two-sided.
  • adjective Affecting or undertaken by two sides equally; binding on both parties.
  • adjective Relating to the right and left sides of the body or of a body structure.
  • adjective Having or marked by bilateral symmetry.

from The Century Dictionary.

  • Having two sides; of or pertaining to two sides; two-sided.
  • In botany, having the sides different.
  • In biology, having the sides symmetrical.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective Having two sides; arranged upon two sides; affecting two sides or two parties.
  • adjective (Biol.) Of or pertaining to the two sides of a central area or organ, or of a central axis.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective having two sides
  • adjective involving both sides equally
  • adjective binding on both parties to an agreement
  • adjective having bilateral symmetry
  • adjective anthropology involving descent or ascent regardless of sex and side of the family

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective having two sides or parts
  • adjective affecting or undertaken by two parties
  • adjective having identical parts on each side of an axis

Etymologies

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