bn:00017547n
Noun Concept
Categories: Chalk, Articles with short description, Webarchive template other archives, Sewing equipment
EN
chalk  gypsum
English:
rock
Definitions
Relations
Sources
EN
Chalk is a soft, white, porous, sedimentary carbonate rock. Wikipedia
Type of sedimentary rock, composed predominantly of calcium carbonate. Wikipedia Disambiguation
WordNet 3.0 & Open English WordNet
EN
Wikipedia
EN
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