# Terminology and units

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Definitions and unit conventions used throughout the FlavoRotor research record.

In brief

Definitions and unit conventions used throughout the FlavoRotor research record.

## Core definitions

 |
 Term | Operational definition

 | Taste | Basic gustatory perception such as sweet, sour, bitter, salty or umami
 | Aroma | Olfactory contribution arising predominantly from volatile compounds
 | Flavour | Combined taste, aroma, texture, trigeminal and contextual perception
 | Texture | Mechanical and structural perception measured instrumentally and/or sensorially
 | Recipe | Versioned schedule of measurable cultivation setpoints and actions
 | Biological replicate | An independently grown plant or experimental unit
 | Technical replicate | Repeated measurement of the same biological sample
 | Independent cycle | A cultivation run started at a separate time with a new biological batch

## Required units

 |
 Quantity | Symbol | Unit

 | Hydrogen-ion activity | pH | dimensionless logarithmic activity scale
 | Electrical conductivity | EC | mS/cm, temperature reported
 | Photon flux density | PPFD | µmol·m⁻²·s⁻¹
 | Daily light integral | DLI | mol·m⁻²·d⁻¹
 | Temperature | T | °C
 | Relative humidity | RH | %
 | Vapour-pressure deficit | VPD | kPa
 | Angular speed | n | rev/min
 | Angular velocity | ω | rad/s
 | Flow | Q | mL/min
 | Concentration | c | mmol/L or mg/L, species stated
 | Fresh/dry mass | m | g

## Reporting rules

- EC is always reported with solution temperature or temperature compensation.
- pH is reported with calibration date, buffers and electrode identifier.
- Light is reported at plant position, not inferred only from electrical wattage.
- Concentration values identify the chemical species and basis, for example mg/L K rather than “potassium EC”.
- Mean values include variability, sample size and the experimental unit.

## Metrology source

Accuracy, precision, repeatability, resolution, calibration and uncertainty are used according to international metrology vocabulary and guidance. [R38] [R39]

## References

- [R38] Joint Committee for Guides in Metrology (2008). Evaluation of measurement data — Guide to the expression of uncertainty in measurement. *JCGM 100:2008*. https://doi.org/10.59161/JCGM100-2008E
- [R39] Joint Committee for Guides in Metrology (2012). International vocabulary of metrology — Basic and general concepts and associated terms. *JCGM 200:2012*. https://doi.org/10.59161/JCGM200-2012