reproductive system morphology trait inguinal canal morphology trait ATOL:0000483 Any measurable or observable characteristic related to the shape, structure, color, or pattern of the passage in the lower abdominal wall through which the spermatic cord in the male or the round ligament in the female, nerves and vessels pass from the pelvic cavity to the scrotum or labia majora, respectively. Trait.ontology VT:0003673