GENITAL FUR'ROW
\d͡ʒˈɛnɪtə͡l fˈʌrɹə͡ʊ], \dʒˈɛnɪtəl fˈʌrɹəʊ], \dʒ_ˈɛ_n_ɪ_t_əl f_ˈʌ_r_ɹ_əʊ]\
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An anteroposterior groove formed on the lower aspect of the genital tubercle of the embryo. In the male it closes, forming the spongy portion of the urethra; in the female it remains open, except that it unites with the perineum posteriorly, and its lips are converted into the labia minora.
By Smith Ely Jelliffe