"A material substance originating from a biological entity intended to be transplanted or infused into another (possibly the same) biological entity." - HL7 FHIR, BiologicallyDerivedProduct. Note that the FHIR BiologicallyDerivedProduct resource combines both type-level and instance-level properties into a single resource; the FHIM separates these into two classes (BiologicProduct and BiologicProductInstance), which reference each other.