What is "conjoint tendon"

The conjoint tendon (previously known as the inguinal aponeurotic falx) is a structure formed from the lower part of the common aponeurosis of the internal abdominal oblique and the transverse abdominal as it inserts into the crest of the pubis and pectineal line immediately behind the superficial inguinal ring. It is usually conjoint with the tendon of the abdominal internal oblique muscle, but they may be separate as well. It forms the medial part of the posterior wall of the inguinal canal.