The Collaborative International Dictionary
carkanet
Carcanet \Car"ca*net\ (k[aum]r"k[.a]*n[e^]t), n. [Dim. fr. F.
carcan the iron collar or chain of a criminal, a chain of
precious stones, LL. carcannum, fr. Armor. kerchen bosom,
neck, kelchen collar, fr. kelch circle; or Icel. kverk troat,
OHG. querca throat.]
A jeweled chain, necklace, or collar. [Also written
carkanet and carcant.]
--Shak.
Wiktionary
carkanet
n. (alternative form of carcanet English)