
1) About 18 inches 2) An old army measure 3) Ancient linear unit 4) Ancient measure 5) Ancient measure of length 6) Ancient measurement 7) Ancient unit of length 8) Ark measure 9) Ark measurement 10) Ark spec 11) Ark unit 12) Biblical distance 13) Biblical length 14) Biblical measure 15) Biblical unit of length 
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https://www.crosswordclues.com/clue/cubit

1) Ell 
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https://www.crosswordclues.com/clue/cubit

 CUBIT is an open source multi-touch system designed by Stefan Hechenberger and Addie Wagenknecht for Nortd Labs. It was developed to `demystify multitouch` technology through making its software and hardware open source and is a direct competitor of Microsoft Surface. == Purchasing == As of May 2, 2008 they are accepting orders for developer kit.....
Found on 
http://en.wikipedia.org/wiki/CUBIT

 The cubit is an ancient unit of length based on the length of the forearm from the elbow to the tip of the middle finger. Cubits of various lengths were employed in many parts of the world in antiquity, during the Middle Ages and as recently as Early Modern Times. The term is still used in hedge laying, the length of the forearm being frequently u...
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http://en.wikipedia.org/wiki/Cubit

• (n.) The forearm; the ulna, a bone of the arm extending from elbow to wrist. • (n.) A measure of length, being the distance from the elbow to the extremity of the middle finger.
Found on 
http://thinkexist.com/dictionary/meaning/cubit/

unit of linear measure used by many ancient and medieval peoples. It may have originated in Egypt about 3000 ; it thereafter became ubiquitous in the ... [3 related articles]
Found on 
http://www.britannica.com/eb/a-z/c/166

A measure of length used in the ancient world. It is approximately equal to the length of a person's forearm, i.e. the part of the arm from the elbow to the fingers. The Romans used a cubit equal to 17.4 modern inches; the Egyptians used one of 20.64 inches.
Found on 
http://www.daviddarling.info/encyclopedia/C/cubit.html
Cu'bit (kū'bĭt) 
 noun [ Latin 
 cubitum , 
 cubitus ; elbow, ell, cubit, from (because the elbow serves for leaning upon) 
 cubare to lie down, recline; confer Greek 
 ky`biton elbow, 
 ky`ptein to bend, stoop, 
 kyfo`s bent, stooping, humpbacked....
Found on 
http://www.encyclo.co.uk/webster/C/199

Lengths: 2 spans, 28 digits. Elbow to middle finger tip. Approx 18 inches.
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http://www.hemyockcastle.co.uk/measure.htm

The cubit was a Hebrew, Roman and English unit of measurement based upon the length of a man's forearm. The English cubit was reckoned at 18 inches, the Hebrew 22 inches and the Roman 17.5 inches.
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http://www.probertencyclopaedia.com/browse/AC1.HTM

[
n] - an ancient unit of length based on the length of the forearm
Found on 
http://www.webdictionary.co.uk/definition.php?query=cubit

cubit 1. A historic unit of distance frequently mentioned in the Bible and other ancient sources.  2. Etymology: from Latin cubitum, 'the elbow'; related to cubare, 'to lie down, be lying'; that is, 'on which someone lies in a reclining position.  An ancient unit of measure based on the forearm from elbow to fingertip, usually from eighteen to twen...
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http://www.wordinfo.info/words/index/info/view_unit/582/

Unit of length equal to 0.4572m.ttle='Length';xiunt='cubit';yiunt='m';mconv=2.1872265966754156;cconv=0.0; See also: Length, Metre, SI Units.
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https://www.encyclo.co.uk/local/20687
 noun an ancient unit of length based on the length of the forearm
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https://www.encyclo.co.uk/local/20974

20.6 inches (about 52.3 centimeters).
Found on 
https://www.encyclo.co.uk/local/21251

an ancient linear unit based on the length of the forearm, from elbow to the tip of the middle finger, usually from 17 to 21 in. (43 to 53 cm).
Found on 
https://www.infoplease.com/dictionary/cubit
  No exact match found.