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tropism
Definitions
[ˈtrəʊpɪz(ə)m], (Noun)
Definitions:
- the turning of all or part of an organism in a particular direction in response to an external stimulus
Phrases:
Origin
:
late 19th century: from Greek tropos ‘turning’ (from trepein ‘to turn’) + -ism
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definition by Oxford Dictionaries