Definition of thale cress in English:

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thale cress

Pronunciation: /ˌTHāl ˈkres/


A small white-flowered plant of north temperate regions, widely used in genetics experiments due to its small number of chromosomes and short life cycle.
  • Arabidopsis thaliana, family Brassicaceae.
Example sentences
  • She interbred her plants with experimental thale cress that had altered forms of these other interesting genes.
  • The annual thale cress, Arabidopsis thaliana, has a complete life cycle of about 6-8 weeks.
  • Most of the recent experiments that have led to an understanding of how plants use light at those molecular levels were performed on Arabidopsis thaliana, the thale cress.


Late 18th century: named after Johann Thal (1542–83), German physician.

For editors and proofreaders

Syllabification: thale cress

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