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Oat fowlOat grass
Oatcake
Oaten
Oates
Oath
Oath of abjuration
Oath supremacy
Oathable
Oathbreaking
Oatmeal
oatmeal cookie
OATS
OAW
Oaxaca
Oaxaca de Juarez
-- OB --
Ob River
Ob-
Obadiah
OBAK
obbligato
Obcompressed
Obconic
Obcordate
OBD
OBDC
Obdiplostemonous
Obdiplostemony
Obdormition
Obduce
Obduct
Obduction
OB
| Noun | 1. | Ob - a major river of western Siberia; flows generally northward and westward to the Gulf of Ob and the Kara Sea Synonyms: Ob River |
| 2. |  OB - the branch of medicine dealing with childbirth and care of the mother |