What is the definition of Tropism? | Dictionary.net

TROPISM

\tɹˈə͡ʊpɪzəm], \tɹˈə‍ʊpɪzəm], \t_ɹ_ˈəʊ_p_ɪ_z_ə_m]\

Definitions of TROPISM

2006 - WordNet 3.0
2011 - English Dictionary Database
2010 - New Age Dictionary Database
1913 - Webster's Revised Unabridged Dictionary
2010 - Medical Dictionary Database
1920 - A dictionary of scientific terms.

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an involuntary orienting response; positive or negative reaction to a stimulus source

2006 - WordNet 3.0
By Princeton University

an involuntary orienting response; positive or negative reaction to a stimulus source

2011 - English Dictionary Database
By DataStellar Co., Ltd

Modification of the direction of growth.

2010 - New Age Dictionary Database
By Oddity Software

Modification of the direction of growth.

1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.

The directional growth of an organism in response to an external stimulus such as light, touch, or gravity. Growth towards the stimulus is a positive tropism; growth away from the stimulus is a negative tropism. (From Concise Dictionary of Biology, 1990)

2010 - Medical Dictionary Database
By DataStellar Co., Ltd

The tendency of an organism to react in a certain way to a certain kind of stimulus; a tendency to move towards (positive) or away from (negative) a source of stimulus; chemo-, geo-, photo-, tropho-tropism.

1920 - A dictionary of scientific terms.
By Henderson, I. F.; Henderson, W. D.

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