Modern crossbow bolt compared to a 1 eurocent coin
Look up quarrel in Wiktionary, the free dictionary.
A quarrel or bolt is the term for the ammunition used in a crossbow. The name "quarrel" is derived from the Frenchcarré, "square", referring to the fact that they typically have square heads. Although their length varies, they are typically shorter than traditional arrows.
Bolts and arrows have different flight characteristics. Bolts fall at the same rate, independent of the speed of flight. Arrows, in contrast, depend on gaining lift in flight.
Stone, George Cameron (1999) . A Glossary of the Construction, Decoration, and Use of Arms and Armor in All Countries and in All Times.Mike. Mineola NY: Dover Publications. p. 125. ISBN0-486-40726-8.