bivalent /bī-vāˈlənt or bivˈə-lənt/

1. Having a valency of two (chem)
2. Relating to one of a pair of homologous chromosomes (also noun)

bivalence or bivalency noun

• tree onions
• tree peonies
• tree peony
• tree rings
• trees
• treeship
• treeships
• tree shrew
• tree shrews
• tree snake
• tree snakes
• trees of heaven
• tree sparrow
• tree sparrows
• tree stump
• tree stumps
• tree surgeon
• tree surgeons
• tree surgeries
• tree surgery
• tree toad
• tree toads
• tree tomato
• tree tomatoes
• treetop