a Producing abrasion; rough enough to wear away the outer surface. (defdate|First attested in 1805.)
a Being rough and coarse in manner or disposition; causing irritation. (defdate|First attested in 1925.)
n A substance or material such as sandpaper, pumice, or emery, used for cleaning, smoothing, or polishing. (defdate|First attested in the mid 19th century.)(reference-book | last =| first = | authorlink = | coauthors = | editor =Brown, Lesley | others = | title = The Shorter Oxford English Dictionary | origdate = | origyear = 1933| origmonth = | url = | format = | accessdate = | accessyear = | accessmonth = | edition = 5th | date = | year =2003| month = | publisher =Oxford University Press | location =Oxford, UK | language = | id = | doi = | isbn =978-0-19-860575-7 | lccn = | ol = | pages =7| chapter = | chapterurl = | quote =)
n (geology) Rock fragments, sand grains, mineral particles, used by water, wind, and ice to abrade a land surface.