Definition of detorsion in English:

detorsion

noun

Zoology
  • (in gastropod mollusks) the evolutionary reversion of a group to a primitive linear body plan.

    Compare with torsion
    • ‘The latter group includes radically modified animals, the Opisthobranchia and Pulmonata, which undergo detorsion and essentially re-evolve bilateral symmetry.’
    • ‘The bodies of most members of this group show evidence of detorsion.’
    • ‘Some species undergo reverse torsion (‘detorsion’), but evidence of having passed through a twisted phase can be seen in the anatomy of these forms.’

Pronunciation:

detorsion

/dēˈtôrSHən/