(formerly) a soldier armed with a carbine.
Also carabineer, carabinier.
Origin of carbineer
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
carabineer or carabinier (ˌkærəbɪˈnɪə)
(formerly) a soldier equipped with a carbine
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
"mounted soldier armed with a carbine," 1670s, from French carabinier (17c.), from carabine "carbine" (see carbine). Italian carabinieri "soldiers serving as a police force" is the same word.
Online Etymology Dictionary, © 2010 Douglas Harper