Freebase(0.00 / 0 votes)Rate this definition: Arbol is a programming language which has been primarily developed for use in Genetic Programming experiments. It is a functional programming language inspired by the ideas of other small and esoteric languages.
Causes. In most cases of colon or rectal cancers, the cause or causes are unknown. Defects in genes that normally protect against cancer play the major role in causing polyp cells to continuously change and become cancerous.
Bowel cancer causes and symptoms. Causes. The exact cause of bowel cancer is not known. However, some factors increase the chance of developing bowel cancer. Risk factors include: Age â bowel cancer more commonly affects people over the age of 50. Polyps - having a large nuber of polyps in the bowel.