† perididymisn. [ < peri-prefix + -didymis (in epididymisn.), perhaps after French pérididyme (1869 in Littré)] Obsoleterare the tunica albuginea of the testis and epididymis.Apparently only attested in dictionaries or glossaries.
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1890 Cent. Dict.Perididymis, the tunica albuginea.