Semantics as a field of study also has significant ties to various representational theories of meaning including truth theories of meaning, coherence theories of meaning, and correspondence theories of meaning. Each of these is related to the general philosophical study of reality and the representation of meaning.
packed-cell volume (PCV) hematocrit. plasma volume the total volume of blood plasma, i.e., the extracellular fluid volume of the vascular space; see also blood volume. red cell volume the total volume of red cells in the body; see also blood volume.
    PCV is an acronym for Positive Crankcase Ventilation. This valve is needed to relieve the pressure built up in the crankcase that is created by the heating of the air inside the engine. If this valve were not present and the pressure went unchecked, it would blow out the seals and gaskets inside your engine.    PCV stands for Positive Crankcase Ventilation.This replaceable valve replaced the vent pipe on the engine, this got rid of the fumes and or pressure that builds up in the crankcase, nowadays the crankcase does not vent into the environment. Answer   A PCV valve is a valve (or fixed orifice metering device) which adjusts airflow through the PCV system to allow PCV operation without adversely affection â¦ fuel metering. The PCV system moves air from the air cleaner through the crankcase, then into the engine intake.