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an element found in very small amounts in a given substance. organisms need certain trace elements to survive.
物質中にごくわずかに含まれる元素。生物が生きていくためには一定の微量元素が必要である。
出典:Wiktionary
出典:『Wiktionary』 (2025/03/26 19:16 UTC 版)
Compound of trace (“very small amount”) + element (“chemical element”).
trace element (plural trace elements)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/05 22:57 UTC 版)
In analytical chemistry, a trace element is an element in a sample that has an average concentration of less than 100 parts per million measured in atomic count, or less than 100 micrograms per gram.
Trace element