bismuthic
- a containing bismuth (especially in the pentavalent state)
bicylindrical
- a having two cylindrical surfaces usually with parallel axes
certain lenses are bicylindrical
biddable
- s willing to carry out the orders or wishes of another without protest
bidentate
- s having toothlike projections that are themselves toothed
bidirectional
- a reactive or functioning or allowing movement in two usually opposite directions