Dictionary:

hydrostatic

  (hī'drə-stăt'ĭk) also hydrostatical (-ĭ-kəl)

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Of or relating to hydrostatics.

Of or relating to fluids at rest or under pressure.

Pertaining to a liquid in a state of equilibrium or the pressure exerted by a stationary fluid.

• h. pressure — a significant factor in intestinal absorption; the tissue fluid pressure against which osmosis has to achieve a positive gradient if small molecules are to pass the cell membranes and be absorbed.

The adjective has one meaning:

Meaning #1: relating to fluids at rest or to the pressures they exert or transmit
  Antonym: hydrokinetic (meaning #1)
  Pertains to noun: hydrostatics (meaning #1)