Definition of autotropism in English:

autotropism

noun

  • 1Botany. The tendency of a plant part, especially a root or shoot, to grow in a straight line or to retain its normal spatial orientation even in the presence of altered tropic stimuli (such as light or gravity).

  • 2Mycology. The tendency of a fungal hypha to grow towards or away from another hypha in the same mycelium, or of the germ-tube of a germinating spore to grow towards or away from a spore of the same species.

Origin

Late 19th century; earliest use found in The Botanical Gazette. From auto- + -tropism.

Pronunciation

autotropism

/ˌɔːtə(ʊ)ˈtrəʊpɪz(ə)m/