chert /chûrt/ (geology)

A siliceous rock of cryptocrystalline silica occurring as bands or concretions in sedimentary rock, eg limestone

• Nototherium
• Nototrema
• notoungulate
• notoungulates
• notour
• not out
• not-pated
• not proven
• not quite the thing
• Notre-Dame
• no-trump
• no-trumper
• no-trumps
• not say boo to a goose
• not see beyond one's nose
• not see further than the end of one's nose
• not see the wood for the trees
• nott
• not take no for an answer
• not tell chalk from cheese
• not that
• not the end of the world
• not the faintest
• not the full quid
• not the full shilling