The Collaborative International Dictionary of English v.0.48:

Hydrostatic \Hy`dro*stat"ic\, Hydrostatical \Hy`dro*stat"ic*al\,
   a. [Hydro-, 1 + Gr. ? causing to stand: cf. F. hydrostatique.
   See Static.]
   Of or relating to hydrostatics; pertaining to, or in
   accordance with, the principles of the equilibrium of fluids.
   [1913 Webster]

         The first discovery made in hydrostatics since the time
         of Archimedes is due to Stevinus.        --Hallam.
   [1913 Webster]

   Hydrostatic balance, a balance for weighing substances in
      water, for the purpose of ascertaining their specific
      gravities.

   Hydrostatic bed, a water bed.

   Hydrostatic bellows, an apparatus consisting of a
      water-tight bellowslike case with a long, upright tube,
      into which water may be poured to illustrate the
      hydrostatic paradox.

   Hydrostatic paradox, the proposition in hydrostatics that
      any quantity of water, however small, may be made to
      counterbalance any weight, however great; or the law of
      the equality of pressure of fluids in all directions.

   Hydrostatic press, a machine in which great force, with
      slow motion, is communicated to a large plunger by means
      of water forced into the cylinder in which it moves, by a
      forcing pump of small diameter, to which the power is
      applied, the principle involved being the same as in the
      hydrostatic bellows. Also called hydraulic press, and
      Bramah press. In the illustration, a is a pump with a
      small plunger b, which forces the water into the cylinder
      c, thus driving upward the large plunder d, which performs
      the reduced work, such as compressing cotton bales, etc.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Press \Press\, n. [F. presse. See 4th Press.]
   1. An apparatus or machine by which any substance or body is
      pressed, squeezed, stamped, or shaped, or by which an
      impression of a body is taken; sometimes, the place or
      building containing a press or presses.
      [1913 Webster]

   Note: Presses are differently constructed for various
         purposes in the arts, their specific uses being
         commonly designated; as, a cotton press, a wine press,
         a cider press, a copying press, etc. See Drill press.
         [1913 Webster]

   2. Specifically, a printing press.
      [1913 Webster]

   3. The art or business of printing and publishing; hence,
      printed publications, taken collectively, more especially
      newspapers or the persons employed in writing for them;
      as, a free press is a blessing, a licentious press is a
      curse.
      [1913 Webster]

   4. An upright case or closet for the safe keeping of
      articles; as, a clothes press. --Shak.
      [1913 Webster]

   5. The act of pressing or thronging forward.
      [1913 Webster]

            In their throng and press to that last hold. --Shak.
      [1913 Webster]

   6. Urgent demands of business or affairs; urgency; as, a
      press of engagements.
      [1913 Webster]

   7. A multitude of individuals crowded together; ? crowd of
      single things; a throng.
      [1913 Webster]

            They could not come nigh unto him for the press.
                                                  --Mark ii. 4.
      [1913 Webster]

   Cylinder press, a printing press in which the impression is
      produced by a revolving cylinder under which the form
      passes; also, one in which the form of type or plates is
      curved around a cylinder, instead of resting on a flat
      bed.

   Hydrostatic press. See under Hydrostatic.

   Liberty of the press, the free right of publishing books,
      pamphlets, or papers, without previous restraint or
      censorship, subject only to punishment for libelous,
      seditious, or morally pernicious matters.

   Press bed, a bed that may be folded, and inclosed, in a
      press or closet. --Boswell.

   Press of sail, (Naut.), as much sail as the state of the
      wind will permit.
      [1913 Webster]