Ob (redirected from OBS)

Ob  (b, ôb, ôp)

A river, about 3,700 km (2,300 mi) long, of central Russia flowing generally northward to the Gulf of Ob, an arm of the Arctic Ocean.

Thesaurus

Noun	1.	Ob - a major river of western Siberia; flows generally northward and westward to the Gulf of Ob and the Kara Sea Ob River Siberia - a vast Asian region of Russia; famous for long cold winters
	2.	OB - the branch of medicine dealing with childbirth and care of the mother midwifery, obstetrics, tocology induction of labor - (obstetrics) inducing the childbirth process artificially by administering oxytocin or by puncturing the amniotic sac presentation - (obstetrics) position of the fetus in the uterus relative to the birth canal; "Cesarean sections are sometimes the result of abnormal presentations" incompetent cervix - (obstetrics) uterine cervix that becomes dilated before term and without labor often resulting in miscarriage or premature birth medical specialty, medicine - the branches of medical science that deal with nonsurgical techniques fetology, foetology - the branch of medicine concerned with the fetus in the uterus perinatology - the branch of obstetrics concerned with the anatomy and physiology and diagnosis and treatment of disorders of the mother and the fetus or newborn baby during late pregnancy and childbirth and the puerperium nullipara - (obstetrics) a woman who has never give birth to a child gravida I, primigravida - (obstetrics) a woman who is pregnant for the first time para I, primipara - (obstetrics) woman who has been delivered of a child for the first time quadripara - (obstetrics) woman who has given birth to a viable infant in each of four pregnancies quintipara - (obstetrics) woman who has given birth to a viable infant in each of five pregnancies para, parity - (obstetrics) the number of liveborn children a woman has delivered; "the parity of the mother must be considered"; "a bipara is a woman who has given birth to two children"