Definition of thigmotropism in English:

thigmotropism

noun

Biology
  • [mass noun] The turning or bending of a plant or other organism in response to a touch stimulus.

    • ‘This paper focuses on the recent advances in four of the best-understood tropic responses and how each affects plant growth and development: phototropism, gravitropism, thigmotropism and hydrotropism.’
    • ‘Negative thigmotropism is movement away from an object, such as a root away from a rock in the soil.’
    • ‘More recently, however, the Arabidopsis root movements were reinterpreted as the combined effect of essentially three processes, circumnuation, gravitropism and negative thigmotropism.’
    • ‘One of the most common examples of thigmotropism is seen in tendrils, which wrap around any object with which they come in contact.’
    • ‘At first, mushroom primordia grow perpendicularly away from the surface from which they arise, independently of the direction of light or gravity, a response that may be some kind of negative thigmotropism or negative hydrotropism.’

Origin

Early 20th century: from Greek thigma touch + tropism.

Pronunciation:

thigmotropism

/ˌθɪɡmə(ʊ)ˈtrəʊpɪz(ə)m/