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An instrument used to obtain cylindrical samples of geological materials or ocean sediments.



Related Terms

ELECTROKINETOGRAPH

An instrument used to measure ocean current velocities based on their electrical effects in the magnetic field of the earth.

ACOUSTIC THEODOLITE

An instrument that uses sound waves to provide a continuous vertical profile of ocean currents at a specific location.

FOAM EXTINGUISHERS

These fire extinguishers use a cylindrical tank that is filled with sodium bicarbonate and an inner container with a solution of aluminium sulphate that combine to produce foam discharge.

RELIEF

  1. The elevations of a land surface; represented graphics by contours, hypsometric tints, spot elevations, hachures, etc. Similar representation of the ocean floor is called SUBMARINE RELIEF.
  2. The removal of a buoy (formerly also referred to lightships) from station and provision of another buoy having the operating characteristics authorized for that station.

PACHYMETER

An instrument used to measure the thickness of a material, for example, a sheet of paper.

CONDUCTOMETER

An instrument designed to measure thermal conductivity; in particular, one that compares the rates at which different rods transmit heat.

INLAND SEA

A body of water nearly or completely surrounded by land, especially if very large or composed of salt water. If completely surrounded by land, it is usually called a LAKE. This should not be confused with CLOSED SEA, that part of the ocean enclosed by headlands, within narrow straits, etc., or within the territorial juris- diction of a country.

CAT O'NINE TAILS

An instrument of punishment being a whip with nine strands as the terminal.

ESTUARY

  1. An embayment of the coast in which fresh river water entering at its head mixes with the relatively saline ocean water. When tidal action is the dominant mixing agent, it is usually called TIDAL ESTUARY. 2. the lower reaches and mouth of a river emptying directly into the sea where tidal mixing takes place. Sometimes called RIVER ESTUARY. 3. A drowned river mouth due to sinking of the land near the coast.

MONITOR

  1. An instrument used to measure continuously or at intervals a condition that must be kept within prescribed limits, such as radioactivity at some point in a nuclear reactor, a variable quantity in an automatic process control system, the transmissions in a communication channel or bank, or the position of an aircraft in flight. 2. To use meters or special techniques to measure such a condition. 3. A person who watches a monitor.

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