bilateran
Adjective. Pertaining to organisms with bilateral symmetry, i.e. that has an axis of symmetry that goes down from the top to bottom, such as humans.This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.
This entry was last updated on RefTopia from its source on 3/20/2012.