We do not currently know of any synonyms for collateral circulation.
The noun collateral circulation is defined as:
The circulation of blood through a network of vessels that is developed through enlargement of secondary vessels and use of existing anastomoses between adjacent vessels when a major vein or artery is functionally impaired, as by obstruction.
New Story Writing Game!
Win Amazon gift cards by writing simple stories at Fictish,
a new story writing game backed by WordHippo.