Oil slick from the Montara oil spill in the Timor Sea, September 2009. An oil spill is the release of a liquid petroleum hydrocarbon into the environment, especially marine areas, due to human activity, and is a form of pollution.The term is usually applied to marine oil spills, where oil is released into the ocean or coastal waters, but spills may also occur on land.il slick from the Montara oil spill in the Timor Sea, September 2009. An oil spill is the release of a liquid petroleum hydrocarbon into the environment, especially marine areas, due to human activity, and is a form of pollution.
kin - group of people related by blood or marriage. clan, kin group, kindred, kinship group, tribe. social group - people sharing some social relation. mishpachah, mishpocha - (Yiddish) the entire family network of relatives by blood or marriage (and sometimes close friends); she invited the whole mishpocha.
Medical Definition of kin selection. : a theory of natural selection which states that a usually altruistic behavior or attribute that lowers the fitness of a particular individual is selected for if it increases the probability of survival and reproduction of related kin who possess some or all of the same genes as the altruistic individual.