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)

• cotton gin
• cotton gins
• cotton grass
• cotton grasses
• cottoning
• cotton mill
• cotton mills
• cottonmouth
• cottonmouths
• cottonocracies
• cottonocracy
• cotton on
• cotton on to
• cotton-picking
• cotton plant
• cotton plants
• cotton press
• cotton presses
• cottons
• cotton sedge
• cottonseed
• cottonseeds
• cotton spinner
• cotton spinners
• cotton stainer