Nouns denoting substances

matrix
(geology) a mass of fine-grained rock in which fossils, crystals, or gems are embedded
 
polypropene
a polymer of propylene used as a thermoplastic molding material
 
amyloid
(pathology) a waxy translucent complex protein resembling starch that results from degeneration of tissue
 
pyrogen
any substance characterized by its great flammability
 
tungstate
a salt of tungstic acid
 
recombinant protein
a protein derived from recombinant DNA
 
bog soil
poorly drained soils on top of peat and under marsh or swamp vegetation
 
driftwood
wood that is floating or that has been washed ashore
 
puddle
a mixture of wet clay and sand that can be used to line a pond and that is impervious to water when dry
 
organophosphate nerve agent
any of a series of nerve agents containing organophosphate compounds first synthesized by German chemists in 1936; in World War II the Germans tested them in concentration camps but not on the battlefield; Iraq is alleged to have used them against Iran and against the Kurds
 
anhydride
a compound formed from one or more other compounds in a reaction resulting in removal of water
 
distilled water
water that has been purified by distillation
 
marking ink
an indelible ink for marking clothes or linens etc.
 
calcium nitrate
a deliquescent salt that is soluble in water; sometimes used as a source of nitrogen in fertilizers
 
zinnwaldite
a mica containing iron and lithium
 
invert sugar
a mixture of equal parts of glucose and fructose resulting from the hydrolysis of sucrose; found naturally in fruits; sweeter than glucose
 
cassiterite
a hard heavy dark mineral that is the chief source of tin
 
melanin
insoluble pigments that account for the color of e.g. skin and scales and feathers
 
sodium carbonate
a sodium salt of carbonic acid; used in making soap powders and glass and paper
 
heavy spar
a white or colorless mineral (BaSO4); the main source of barium
 
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