A specific gravity scale developed by the American Petroleum Institute for measuring the relative density of various petroleum liquids, expressed in degrees. API gravity is gradated in degrees on a hydrometer instrument and was designed so that most values would fall between 10Â° and 70Â° API gravity. The arbitrary formula used to obtain this effect is: API gravity = (141.5/SG at 60Â°F) - 131.5, where SG is the specific gravity of the fluid.
The name Courtney is a French baby name. In French the meaning of the name Courtney is: From the court, or short nose. From the surname of the aristocratic Courtenay family, based on the Old French word meaning short nose.Anglo-Saxon Meaning: The name Courtney is an Anglo-Saxon baby name.n French the meaning of the name Courtney is: From the court, or short nose. From the surname of the aristocratic Courtenay family, based on the Old French word meaning short nose.
Kelsey /kel-sey/ [2 sylls.] as a girls' name (also used less commonly as boys' name Kelsey) is pronounced KEL-see. It is of Old English origin, and the meaning of Kelsey is  victorious ship. Also possibly a place name referring to  island .Popular preference for Kelsey and its variants may be influenced by names like Chelsea and Casey.elsey is a very popular first name for women (#555 out of 4276, Top 13%) and also a very popular surname for all people (#2397 out of 150436, Top 2%). (2000 U.S. Census).