• IPA: /ɹɛn/

ren (plural renes)

1. (anatomy) A kidney.
   • 1893, Henry Power, Leonard William Sedgwick, The New Sydenham Society's Lexicon of Medicine and the Allied Sciences:

     Renal. Belonging to the ren or kidney.

• renal

ren (plural rens)

1. (Egyptian mythology) One’s name, as part of the soul in ancient Egyptian mythology.
   • 1983, Norman Mailer, Ancient Evenings:

     For the Ren did not belong to the man, but came out of the Celestial Waters to enter an infant in the hour of his birth and might not stir again until it was time to go back.

1. (informal, in combination) Clipping of Renaissance

ren

1. (telecommunications) Initialism of ringer equivalence number