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 (mĕz′ə-nĕf′rəs, -rŏs′, mĕs′-)
The second of the three excretory organs that develop in a vertebrate embryo, becoming the functioning kidney in fish and amphibians but replaced by the metanephros in birds, reptiles, and mammals. Also called Wolffian body.

[meso- + Greek nephros, kidney.]

mes′o·neph′ric adj.
References in periodicals archive ?
Nephrogenic adenoma of the urinary bladder is defined as a metaplastic change in the urinary bladder with papillary or cryptic structures which are composed of small hollow tubules similar to mesonephric tubules, which are usually lined by a single layer of bland cuboidal or hobnail cells, surrounding eosinophilic or basophilic secretions [7].
It is generally accepted that the developmental origin of the EDs in rodents is the proximal mesonephric tubules (Linder, 1971; Marshall et al.
The seminiferous tubules converge to form the rete testis, which connects to the mesonephric duct via the mesonephric tubules, which later become the efferent ducts.