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The Orthodox Church in America (OCA) is an Eastern Orthodox Christian church based in North America. The OCA consists of more than 700 parishes, missions, communities, monasteries and institutions in the United States, Canada and Mexico.: 68 In 2011, it had an estimated 84,900 members in the United States.
Offensive counter-air (OCA) is a military term for the suppression of an enemy's military air power, primarily through ground attacks targeting enemy air bases: disabling or destroying parked aircraft, runways, fuel facilities, hangars, air traffic control facilities and other aviation infrastructure. Ground munitions like bombs are typically ...
The Orthodox-Catholic Church of America ( OCCA) is an independent and self-governing Christian syncretic ( Eastern Orthodox / Oriental Orthodox / Western Catholic) jurisdiction based in the United States (including the territory of the US Virgin Islands ), with clergy also in Canada, Mexico, Brazil, Africa, and Australia. [2]
Optimum currency area. In economics, an optimum currency area ( OCA) or optimal currency region ( OCR) is a geographical region in which it would maximize economic efficiency to have the entire region share a single currency. The underlying theory describes the optimal characteristics for the merger of currencies or the creation of a new currency.
Oxalis tuberosa. Molina. Oxalis tuberosa is a perennial herbaceous plant that overwinters as underground stem tubers. These tubers are known as uqa in Quechua, [1] oca in Spanish, yams in New Zealand and a number of other alternative names. The plant was brought into cultivation in the central and southern Andes for its tubers, which are used ...
Obeticholic acid (OCA), sold under the brand name Ocaliva, is a semi-synthetic bile acid analogue which has the chemical structure 6α-ethyl-chenodeoxycholic acid. It is used as a medication used to treat primary biliary cholangitis .
OCA-Asian Pacific American Advocates (previously known as the Organization of Chinese Americans) is a non-profit organization founded in 1973, whose stated mission is to advance the social, political, and economic well-being of Asian Americans and Pacific Islanders (AAPIs) in the United States .
P protein, also known as melanocyte-specific transporter protein or pink-eyed dilution protein homolog, is a protein that in humans is encoded by the oculocutaneous albinism II ( OCA2) gene. [5] The P protein is believed to be an integral membrane protein involved in small molecule transport, specifically of tyrosine —a precursor of melanin.