> For the complete documentation index, see [llms.txt](https://cropmetaweb.gitbook.io/cropsmeta/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cropmetaweb.gitbook.io/cropsmeta/terms-and-abbreviations.md).

# Terms And Abbreviations

Terms and abbreviations commonly used in CropMetaDB.

### LC-MS

liquid chromatography-mass spectrometry

### LC-MS/MS

liquid chromatography tandem-mass spectrometry

### MS2T library

MS/MS spectral tag (MS2T) library. MS2T libraries of CropMetaDB contains MS/MS spectra of known metabolites and  unknown metabolites from crops.

### MS2T Accession Label

 Each MS2T accession was labeled in the format ‘RE0147p′ for example; this denotes the 147th spectrum (0147) derived from the  library of rice (RE) extracts obtained in the positive ion mode (p, positive). 

### IUPAC

International Union of Pure and Applied Chemistry

### InChI

IUPAC International Chemical Identifier

### SMILES

Simplified Molecular Input Line Entry Specification

### **PubChem**

a public database of chemicals and chemical information

### CID

PubChem ID

### **KEGG**

Kyoto Encyclopedia of Genes and Genomes