mer
mer — abbreviation
1. an abbreviation of 'meridian' used in geography and navigation to show a line of
an abbreviation of 'meridian' used in geography and navigation to show a line of longitude on a map or globe — for example, E 120° mer means the line of longitude 120 degrees east of the prime meridian.
The research station is located near the 60° S mer., about 1,000 kilometres from the coast.
number + ° + mer for coordinate reference
Captain Renata plotted the ship's position at 45° W mer. using the old sextant.
On the classroom globe, Tomás traced his finger along the 121° E mer. to find Taipei.
The treaty defined the border along the 100° W mer. from the Arctic down to the Gulf of Mexico.
Hui checked the GPS display and noted the coordinates: 25° N, 121° E mer.
文法句型
number + ° + E/W + mer
number + ° + mer
用法筆記
Almost always followed by a compass direction (E, W) and a degree symbol (°). The form 'mer.' with a period is standard in cartographic notation.
常見錯誤
mer — noun combining form
1. a combining form from Greek 'méros' (part) that attaches to a prefix — most ofte
a combining form from Greek 'méros' (part) that attaches to a prefix — most often a number or descriptive root — to create a scientific noun naming a member of a specific structural class; for example, polymer uses 'poly-' (many) to mean 'a substance whose parts are many', isomer uses 'iso-' (equal) to mean 'same parts in a different arrangement', and monomer uses 'mono-' (one) to mean 'a single part that can join with others'.
The nylon fibres in a climbing rope are a polymer of thousands of identical unit-members.
polymer = poly- (many) + -mer (part) → many-part molecule
Glucose and fructose are structural isomers of the same formula class, with differently connected atoms.
isomer = iso- (equal) + -mer (part) → equal parts, different arrangement
Tokyo chemists made a monomer that joins identical copies into a polymer at room temperature.
Polyethylene, a common plastic, is a polymer built from many identical ethylene units linked together.
When two fatty acid molecules bond together, the resulting dimer carries signals between cells.
文法句型
[prefix] + mer
found in scientific compound nouns