growth substance

growth substance

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growth substance noun
One of a number of substances (sometimes called plant hormones) formed in plants or synthetically, that at low concentrations have specific effects on plant growth or development
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Main Entry:grow

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growth substance,
= growth hormone (def. 2). (Cf.growth hormone)

Useful english dictionary. 2012.

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  • growth hormone — growth′ hor mone n. biochem. any substance that stimulates or controls the growth of an organism, esp. a species specific hormone, as the human hormone somatotropin • Etymology: 1920–25 …   From formal English to slang

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  • growth medium — substance in which microorganisms can be grown …   English contemporary dictionary

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