from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Chemistry Divalent.
- adj. Biology Consisting of a pair of homologous, synapsed chromosomes, as occurs during meiosis; double.
- n. Biology A pair of homologous, synapsed chromosomes associated together during meiosis.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Having a valence of 2.
- adj. Of, or relating to a pair of homologous synapsed chromosomes that occur during meiosis.
- n. Any bivalent chromosome.
from the GNU version of the Collaborative International Dictionary of English
- adj. Equivalent in combining or displacing power to two atoms of hydrogen; dyad.
from The Century Dictionary and Cyclopedia
- In chem., applied to an element an atom of which can replace two atoms of hydrogen or other univalent element, or to a radical which has the same valence as a bivalent atom.
- In cytology, having double as distinguished from single (univalent) chromosomes in the oöcytes and spermatocytes, as in one of the varieties of the roundworm of the horse (Ascaris megalocephala).
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. used of homologous chromosomes associated in pairs in synapsis
- adj. having a valence of two or having two valences
bi- + -valent (Wiktionary)