ˈtōskə noun
( -s )
Etymology: American Spanish, from Spanish, feminine of tosco rough, unpolished, uncouth, probably from Latin tuscus Tuscan; from the disreputable character of the inhabitants of the Vicus Tuscus Tuscan Street in ancient Rome
1. : a calcium carbonate deposit occurring in the loess of the pampas — compare caliche
2. : a soft coral limestone deposit used for various purposes in Puerto Rico (as for masonry, road surfacing, ballast, and as fertilizer)