| OB | the branch of medicine dealing with childbirth and care of the mother |
|---|---|
| OB | a Russian river |
| OB | a Russian river |
| OB | a part of the score that must be performed without change or omission |
| OB | a persistent but subordinate motif |
| OB | resoluteness by virtue of being unyielding and inflexible |
| OB | showing unfeeling resistance to tender feelings |
| OB | stubbornly persistent in wrongdoing |
| OB | in a stubborn unregenerate manner |
| OB | a religious belief of African origin involving witchcraft and sorcery |
| OB | large west African tree having large palmately lobed leaves and axillary cymose panicles of small white flowers and one-winged seeds |
| OB | the wood of an African obeche tree |