Science / Chemistry / Polyatomic Ion: A polyatomic ion is a charged particle that contains more than two covalently bound atoms. See Polyatomic Ions for more.
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Business / Taxes / Own-Occupation Policy: If you purchase an own-occupation disability insurance policy, you are entitled to receive benefits if a disability prevents you from performing the skilled work for which you have been trained. Some MORE
Health / Dentistry / Own Occupation (Own Occur): Under this definition, an employee will be considered disabled only if s/he is unable to perform the duties of his or her occupation. MORE
Entertainment / Literature / Oxford English Dictionary: This fat, twelve+ volume work functions as an historical dictionary of English. It is generally considered the most authoritative and scholarly dictionary of English available--with nearly 300,000 wor MORE
Science / Biology / Oxidation: The loss of electrons from the outer shell of an atom; often accompanied by the transfer of a proton and thus involves the loss of a hydrogen ion. The loss of electrons or hydrogens in a chemical reac MORE
Science / Chemistry / Oxidation Number: A convention for representing a charge of an atom embedded within a compound, if the compound were purely ionic. For example, H2O is a covalent compound; if it were ionic, the hydrogens would be H+ (o MORE
Science / Chemistry / Oxidation Half Reaction: That part of a redox reaction that involves loss of electrons. In the oxidation half reaction, the oxidation number of one or more atoms within the reactants is increased. MORE