n. A device for viewing objects below the surface of the water.
the GNU version of the Collaborative International Dictionary of English
n. An instrument designed to mark the presence of water, especially in air.
n. A kind of water clock, used anciently for measuring time, the water tricking from an orifice at the end of a graduated tube.
The Century Dictionary and Cyclopedia
n. A kind of water-clock or instrument formerly used for measuring time, consisting of a cylindrical graduated tube, form which water slowly escaped through an aperture in the conical bottom, the subsidence of the water marking the lapse of time.
n. A hygroscope.
n. An apparatus for observing objects in the sea or on the sea-bottom.
Word Usage
"MAHMOUD EL KHZNDAN, SHIFA HOSPITAL: So much people killed simply because you have no test tube, no hydroscope, no tube, no I.V. lines, no narcotics for no crushed injuries."