Definition of tropism in English:


Line breaks: trop|ism
Pronunciation: /ˈtrəʊpɪz(ə)m
, ˈtrɒp-/


[mass noun] Biology
The turning of all or part of an organism in a particular direction in response to an external stimulus.
More example sentences
  • This protein is embedded in and extends exterior to the viral lipid membrane and is primarily responsible for host cell receptor binding and host cell tropism.
  • An envelope glycoprotein on the surface is thought to be responsible for mediating viral entry into cells, tissue tropism, and host range.
  • It has a wide cell tropism and remains extra-chromosomal, therefore minimising the risk of insertional mutagenesis.


late 19th century: from Greek tropos 'turning' (from trepein 'to turn') + -ism.

Definition of tropism in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day noisome
Pronunciation: ˈnɔɪs(ə)m
having an extremely offensive smell