Meniscus: The curved top of a column of liquid in a small tube.
Mercury (Hg): Heavy metal that can accumulate in the environment and is highly toxic if breathed or swallowed. (see Heavy Metals) ...
meniscus The curved top of a column of liquid (water, oil, mercury) in a small tube. When the liquid wets the sides of the container, as with water, the curve forms a valley.
meniscus
the curved upper surface of a non-turbulent liquid in a container; it is concave (curves upward) if it wets the container walls, and convex (curves downward) if it does not.
 See also: Decomposition, Gas, Structure, Density, Bacteria
  
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