What does "intravasation" mean?

The entry of foreign (especially cancerous) material into a blood vessel.

Intravasation

noun

noun ·Rare ·Advanced level

Noun

1
The entry of foreign (especially cancerous) material into a blood vessel. countable, uncountable
2
entry of foreign matter into a blood vessel wordnet

From intra- + vas + -ation or intravasate + -ion.