# ParameterUnit

> Canonical unit of a parameter. ucum is absent where UCUM has no code.

> **ParameterUnit** = `object`

Canonical unit of a parameter. `ucum` is absent where UCUM has no code.

## Properties

### symbol

> **symbol**: `string`

Display symbol (e.g. `mg/L`, `µS/cm`, `NTU`). Empty for dimensionless.

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### ucum?

> `optional` **ucum?**: `string`

UCUM code, when one exists.