Falx (disambiguation)

Falx may refer to:
 * Falciform ligament, a ligament of the liver
 * Falx, a sickle, scythe or sickle-like weapon used by Dacians
 * Falx cerebelli and falx cerebri, two parts of the dura mater of the brain
 * Foramen ovale (heart), a fetal cardiac shunt, also called the falx septi
 * Nu Persei
 * Conjoint tendon, a sickle-shaped tendon of the transversus abdominis muscle, also called the inguinal aponeurotic falx