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.
T-11 cells are responsible for producing specific antibodies for our immune system. The skin T-cell theory postulates that castor oil triggers T-lymphocytes in the skin, causing them to activate a local and/or systemic immune reaction.