Nouns denoting substances

volcanic rock
extrusive igneous rock solidified near or on the surface of the Earth
 
PBS
a solution containing a phosphate buffer
 
peptone
any of various water-soluble compounds that form by hydrolysis in the digestion of proteins to amino acids
 
carbonyl
a compound containing metal combined with carbon monoxide
 
boron trifluoride
a pungent colorless gas
 
halibut-liver oil
a fatty oil from halibut livers that is used as a source of vitamin A
 
proprionamide
the amide of propionic acid (C2H5CONH2)
 
ermine
the expensive white fur of the ermine
 
epitope
the site on the surface of an antigen molecule to which an antibody attaches itself
 
Pt
a heavy precious metallic element; grey-white and resistant to corroding; occurs in some nickel and copper ores and is also found native in some deposits
 
ethene
a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic
 
chloropicrin
a heavy colorless insoluble liquid compound that causes tears and vomiting; used as a pesticide and as tear gas
 
heavy hydrogen
an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen)
 
isomerase
an enzyme that catalyzes its substrate to an isomeric form
 
box calf
black calfskin leather tanned with chromium salts
 
ebonite
a hard nonresilient rubber formed by vulcanizing natural rubber
 
cordierite
a blue mineral of magnesium and iron and aluminum and silicon and oxygen; often used as a gemstone
 
hyaluronic acid
a viscous mucopolysaccharide found in the connective tissue space and the synovial fluid of movable joints and the humors of the eye; a cementing and protective substance
 
India rubber
an elastic material obtained from the latex sap of trees (especially trees of the genera Hevea and Ficus) that can be vulcanized and finished into a variety of products
 
lead tetraethyl
a clear oily poisonous liquid added to gasoline to prevent knocking
 
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