Bekhorot 42: words to know

סְמִי מִיכָּן (semi mikan): delete from here; omit from this text. Used repeatedly to emend baraitot by deleting the mention of a tumtum.
טוּמְטוּם (tumtum): an individual whose genital organs are concealed. Central to the daf's debate over whether its gender is doubtful or distinct.
אַנְדְּרוֹגִינוֹס (androginos): hermaphrodite having both male and female characteristics. Contrasted with a tumtum regarding consecration, valuations, and firstborn status.
הוֹאִיל וְאִישְׁתַּנִּי אִישְׁתַּנִּי (ho'il ve'ishtanni ishtanni): since it has changed, it has changed further. Invoked to explain that an anatomically anomalous creature may have other abnormalities.
סְרִיס חַמָּה (saris ḥammah): a congenital eunuch. Examined regarding whether an unsexed male tumtum is exempt from yibbum.