growth substances

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• growth substances — See plant growth substances …   Dictionary of molecular biology

• plant growth substances — Substances that, at low concentration, influence plant growth and differentiation. Formerly referred to as plant hormones or phytohormones, these terms are now suspect because some aspects of the hormone concept , notably action at a distance… …   Dictionary of molecular biology

• growth factor — n a substance (as a vitamin B12 or an interleukin) that promotes growth and esp. cellular growth * * * any of various chemicals, particularly polypeptides, that have a variety of important roles in the stimulation of new cell growth and cell… …   Medical dictionary

• growth promoter — noun 1. Any of various substances which promote growth in plants, such as cytokinin 2. Any of various hormonal substances used to boost the fattening of livestock • • • Main Entry: ↑grow …   Useful english dictionary

• growth hormone — n. 1. a polypeptide hormone of the anterior part of the pituitary gland, that promotes normal growth 2. any of various substances that promote growth, as of plants or beef cattle …   English World dictionary

• growth — /grohth/, n. 1. the act or process, or a manner of growing; development; gradual increase. 2. size or stage of development: It hasn t yet reached its full growth. 3. completed development. 4. development from a simpler to a more complex stage:… …   Universalium

• growth medium — ▪ biology also called  Culture Medium, or Nutrient Broth,         solution freed of all microorganisms by sterilization (usually in an autoclave, where it undergoes heating under pressure for a specific time) and containing the substances… …   Universalium

• growth substance — noun see growth regulator * * * 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 • • • Main… …   Useful english dictionary

• growth medium — Medium Me di*um, n.; pl. L. {Media}, {E}. {Mediums}. [L. medium the middle, fr. medius middle. See {Mid}, and cf. {Medius}.] 1. That which lies in the middle, or between other things; intervening body or quantity. Hence, specifically: (a) Middle… …   The Collaborative International Dictionary of English

• growth regulator — noun Date: 1936 any of various synthetic or naturally occurring plant substances (as an auxin or gibberellin) that regulate growth …   New Collegiate Dictionary

• Restriction of Hazardous Substances Directive — European Union directive: Directive 2002/95/EC Directive on the restriction of the use of certain hazardous substances in electrical and electronic equipment Made by Council Parliament …   Wikipedia