Bidder's organ

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[′bid·ərz ‚ȯr·gən]

(vertebrate zoology)

A structure in the males of some toad species that may develop into an ovary in older individuals.

References in periodicals archive ?

But these superficially normal males sported a maturing Bidder's organ, as did the intersex animals.

Like the human appendix, the Bidder's organ normally has no function.

However, as the intersex animals did, these superficially normal males sported a maturing Bidder's organ.