1) Analytical chemistry 2) Biological necessity 3) Cobalt in the human body 4) Micronutrient 5) Minute quantity 6) Xenon in the atmosphere
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https://www.crosswordclues.com/clue/trace-element
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. In biochemistry, a trace element is a dietary mineral that is needed in very minute quantities for the proper growth, development, and physiology of t...
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http://en.wikipedia.org/wiki/Trace_element
in biology, any chemical element required by living organisms in minute amounts, usually as part of a vital enzyme, a cell-produced catalytic ... [7 related articles]
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http://www.britannica.com/eb/a-z/t/68
An element found in very small amounts in a given substance. Organisms need certain trace elements to survive.
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http://www.cancer.gov/dictionary?expand=T
Any of a number of elements required by living organisms, in small amounts, to ensure normal growth, development, and maintenance. They do not include the basic elements of organic compounds (carbon, hydrogen, oxygen, and nitrogen) or the other major elements present in quantities greater than about...
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http://www.daviddarling.info/encyclopedia/T/traceelement.html
Any chemical element that an organism needs very small quantities of tosurvive. ... (09 Oct 1997) ...
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http://www.encyclo.co.uk/local/20973
a chemical element present or needed in tiny amounts by plants and animals; for humans, these include manganese, copper, cobalt, zinc, and iron.
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http://www.encyclo.co.uk/local/21001
a substance needed in very small amounts for the proper functioning of the body.
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http://www.encyclo.co.uk/local/22225
An element that appears in minerals in a concentration of less than l percent (often less than 0.001
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http://www.encyclo.co.uk/local/22392
Chemical element used by organisms in minute quantities and essential to their physiology.
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http://www.encyclo.co.uk/visitor-contributions.php
An element that appears in minerals in a concentration of less than 1 percent (often less than 0.001 percent).
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http://www.scientificpsychic.com/etc/geology-glossary.html
an element which is essential to the continuing health of an organism, but needed in only small amounts.
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http://www.seafriends.org.nz/books/glossary.htm
[
n] - an element that occurs at very small quantities in the body but is nonetheless important for many biological processes
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http://www.webdictionary.co.uk/definition.php?query=trace%20element
indispensable element present in cells in lower amounts than macronutrients; also called micronutrient
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https://courses.lumenlearning.com/microbiology/chapter/glossary/
noun an element that occurs at very small quantities in the body but is nonetheless important for many biological processes
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https://www.encyclo.co.uk/local/20974
Chemical element necessary in minute quantities for the health of a plant or animal. For example, magnesium, which occurs in chlorophyll, is essential to photosynthesis, and iodine is needed by the thyroid gland of mammals for making hormones that control growth and body chemistry
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https://www.encyclo.co.uk/local/21221
No exact match found.
