A raglan sleeve is a type of sleeve whose distinguishing characteristic is to extend in one piece fully to the collar, leaving a diagonal seam from underarm to collarbone giving the garment a relatively undefined look. 
Commonly seen in non-formal fashion, it is popular in sports and exercise wear.
- Quinion, Michael. "Cardigan". World Wide Words. Retrieved 2013-01-13.
Another item whose name appeared at the time was the raglan, a type of overcoat named after Lord Raglan, a British general in the Crimea. The garment was unusual in that the sleeves continued in one piece up to the neck, producing a larger, looser armhole that suited the one-armed general.
- Oxford English Dictionary Third edition, (2008) online version September 2011, accessed 7 November 2011. An entry for this word was first included in New English Dictionary, 1903.
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