Nouns denoting substances
- otter
- the fur of an otter
- triazine
- any of three isomeric compounds having three carbon and three nitrogen atoms in a six-membered ring
- incense
- a substance that produces a fragrant odor when burned
- amethyst
- a transparent purple variety of quartz; used as a gemstone
- polyunsaturated fatty acid
- an unsaturated fatty acid whose carbon chain has more than one double or triple valence bond per molecule; found chiefly in fish and corn and soybean oil and safflower oil
- notepad
- a pad of paper for keeping notes
- biomass
- plant materials and animal waste used as fuel
- liquid crystal
- a liquid exhibiting properties of a crystal that are not shown by ordinary liquids
- alkylbenzenesulfonate
- sulfonate of alkyl benzene
- exotoxin
- a toxin that is secreted by microorganisms into the surrounding medium
- spirits of ammonia
- a solution of ammonium carbonate in ammonia water and alcohol
- residual oil
- oil products that remain after petroleum has been distilled
- photopigment
- a special pigment found in the rods and cones of the retina
- Ru
- a rare polyvalent metallic element of the platinum group; it is found associated with platinum
- burnt sienna
- a reddish-brown pigment produced by roasting sienna
- rubbish
- worthless material that is to be disposed of
- wood coal
- intermediate between peat and bituminous coal
- Zn
- a bluish-white lustrous metallic element; brittle at ordinary temperatures but malleable when heated; used in a wide variety of alloys and in galvanizing iron; it occurs naturally as zinc sulphide in zinc blende
- Cu
- a ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element; occurs in various minerals but is the only metal that occurs abundantly in large masses; used as an electrical and thermal conductor
- animal oil
- any oil obtained from animal substances
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