The Collaborative International Dictionary
Undersleeve
Undersleeve \Un"der*sleeve`\, n. A sleeve of an under-garment; a sleeve worn under another,
Wiktionary
undersleeve
n. a sleeve, worn underneath another, and visible through slashes or near the hand
Usage examples of "undersleeve".
He straightened his doublet, made sure his linen undersleeves were still white and clean, and tilted his cap even more rakishly over his brow.