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Webster 1913 Edition

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Noun.

[NL., fr. Gr.

μέσοσ

middle +

νεφρόσ

kidney.]

(Anat.)

The middle one of the three pairs of embryonic renal organs developed in most vertebrates; the Wolffian body.

mesonephros ‎(plural mesonephroi)

(biology) The second of the three excretory organs of the developing embryo; the Wolffian body