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.
Flare-ups. Medication can reduce inflammation in the colon and allow it to function properly. This can keep symptoms at bay for months at a time. Sometimes a trigger or another unknown factor can cause the inflammation to return. Avoiding your triggers is the best way to prevent flare-ups. The most common triggers include: stress; upsetting situations