phlebothrombosis

from The Century Dictionary.

• noun Thrombosis in a vein.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The formation of a blood clot in a vein independently from the presence of inflammation of the vein.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun thrombosis of a vein without prior inflammation of the vein; associated with sluggish blood flow (as in prolonged bedrest or pregnancy or surgery) or with rapid coagulation of the blood