Examlex
The vertical distance from the still water level to the crest of a wave is called the ________.
Micrometer
A unit of length in the metric system equal to one millionth of a meter, also used as a device for precise measurements of small distances.
Nanometer
A unit of length in the metric system, equal to one billionth of a meter, often used to measure wavelengths of light and dimensions of molecules.
Picometer
A unit of length in the metric system, equal to one trillionth of a meter, used to measure extremely small distances.
Nucleolus
Specialized structure in the cell nucleus formed from regions of several chromosomes; site of assembly of the ribosomal subunits.
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