The "cubit" (Greek: πῆχυς, pēchys) in ancient Greece was a unit of length used in antiquity for measuring various objects, including architectural dimensions. Like many ancient units of measurement, the length of the Greek cubit could vary over time and by region.
The most commonly referenced Greek cubit is the "common" or "short" cubit, which is believed to have been approximately 45 centimeters (about 17.7 inches) in length. However, there were variations in the length of the cubit in different parts of Greece and during different periods in ancient history.
The Greek cubit was used for measuring building dimensions, as well as in various crafts and trades. It was often based on the length of the forearm from the elbow to the tip of the middle finger, much like other cubits used in different ancient cultures.
It's important to note that the length of the Greek cubit is a matter of historical interpretation and may not be precisely defined due to variations in antiquity.
A "centiinch" is not a standard or widely recognized unit of measurement. In the International System of Units (SI), length is typically measured in meters and its subunits, such as centimeters (1 meter = 100 centimeters) and millimeters (1 meter = 1,000 millimeters).
The term "centiinch" appears to be a combination of two different measurement systems. "Centi-" is a prefix used in the metric system to denote a factor of 1/100, while "inch" is a unit of length in the imperial system commonly used in the United States and some other countries.
If someone is using the term "centiinch," it may be intended as a humorous or informal way to express a very small length in a mixed-unit fashion, but it is not part of any standard or recognized system of measurement. To avoid confusion, it's generally best to use established units like centimeters or millimeters when measuring small lengths in the metric system, or inches when using the imperial system.