Part Per Trillion

Definition 1

A unit of proportion equal to 10E-12. (NCI Thesaurus)

Definition 2

A unit of measure referring to one entity counted per one trillion entities. (NCI Thesaurus/CDISC)

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Part per Thousand

A unit of proportion equal to 10E-3.

Part per Million per Volume

A unit of proportion equal to 10E-6 per volumic unit.

Part Per Million

A unit of proportion equal to 10E-6.

Part Per Billion

A unit of proportion equal to 10E-9.

Part Dosing Unit

A fraction of a dosing unit.

Part

One of the portions into which something is regarded as divided and which together constitute a whole.