A small number of RBCs are normally present in urine and usually result in a negative chemical test. An increased amount of hemoglobin and/or increased number of RBCs are detected as a positive chemical test result.
gigahertz. n, pl-hertz. 1. (Units) a unit of frequency equal to 10 9 hertz. Symbol: GHz.
Noun. 1. laser-an acronym for light amplification by stimulated emission of radiation; an optical device that produces an intense monochromatic beam of coherent light. optical maser. optical device-a device for producing or controlling light.