Final answer:
The term for cancer that has spread to other organs is metastasis, resulting in new cancers called metastases. Metastasis is associated with a more advanced cancer stage and poorer prognosis.
Step-by-step explanation:
The term best associated with cancer that has spread to other organs of the body is metastasis. When cancer cells from a primary tumor enter the bloodstream, they can travel and start growing in other tissues. These new cancers that form in distant sites are known as metastases. Different types of cancers have a tendency to spread to specific organs such as the brain, lungs, bones, and liver. Metastasis indicates a more advanced stage of cancer and is often associated with a poorer prognosis and a higher number of cancer deaths.