https://doi.org/10.1351/goldbook.10842
Pseudohermaphroditic condition in female gastropods (snails) manifested by the development (imposition) of male characteristics such as a penis or vas deferens.
Note: Quantitation of imposex in the dog whelk (Nucella lapillus) has been used to monitor pollution by the antifouling agent tributyltin oxide (TBTO) in marine environments.