The Collaborative International Dictionary of English v.0.48:

Stasis \Sta"sis\ (st[=a]"s[i^]s or st[a^]s"[i^]s), n. [NL., fr.
   Gr. sta`sis a standing still.] (Physiol.)
   A slackening or arrest of the blood current in the vessels,
   due not to a lessening of the heart's beat, but presumably to
   some abnormal resistance of the capillary walls. It is one of
   the phenomena observed in the capillaries in inflammation.
   [1913 Webster]

WordNet (r) 3.0 (2006):

stasis
    n 1: an abnormal state in which the normal flow of a liquid
         (such as blood) is slowed or stopped
    2: inactivity resulting from a static balance between opposing
       forces