Tumtum (Hebrew: טומטום, "hidden") is a term that appears in Jewish Rabbinic literature. It usually refers to a person whose sex is unknown because their genitalia are hidden, undeveloped, or difficult to determine.[2][3][4]
Although they are often grouped together, the tumtum has some halakhic ramifications distinct from those of the androgynos (אנדרוגינוס), who have both male and female genitalia.[5]
Although tumtum does not appear in the Scripture, it does in other literature.[3] Reform rabbi Elliot Kukla writes, "The tumtum appears 17 times in the Mishna; 23 times in the Tosefta; 119 times in the Babylonian Talmud; 22 times in the Jerusalem Talmud; and hundreds of times in midrash, commentaries, and halacha."[6]
In the Babylonian Talmud Yevamot 64a–b, Rabbi Ammi says that the Biblical figures "Abraham and Sarah were originally tumtumim" and infertile and then miraculously turned into a fertile husband and wife in their old age. Rabbi Ammi points to the Book of Isaiah 51:1–2, saying that the references to "Look to the rock from where you were hewn, and to the hole of the pit from where you were dug [...] Look to Abraham your father and to Sarah who bore you" explains their genitals being uncovered and remade.[1]
talmudology
was invoked but never defined (see the help page).