1. chemical symbol (e.g. H for hydrogen); element symbol
Wikipedia definition
2. Chemical symbolA chemical (or atomic) symbol is a 1- or 2-letter internationally agreed code for a chemical element, usually derived from the name of the element, often in Latin. Only the first letter is capitalised. For example, "He" is the symbol for helium (English name, not known in ancient Roman times), "Pb" for lead (plumbum in Latin), "W" for tungsten (wolfram in German, not known in Roman times).
Read “Chemical symbol” on English Wikipedia
Read “元素記号” on Japanese Wikipedia
Read “Chemical symbol” on DBpedia


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