(organic chemistry) an aliphatic dicarboxylic acid, (CH₂)₈(COOH)₂, originally prepared from tallow; it is used in the manufacture of resins, plasticizers and polyester rubbers

(biochemistry) A derivative of DNA having ribose in place of deoxyribose, and uracil in place of thymine; its primary function is in the transcription of genetic material and subsequent synthesis of protein.

(chemistry) any of a range of compounds, being hydrates of silica; they form silicates having complex polymeric structures

(inorganic chemistry) One of several systematic acid names for water, H₂O.

(inorganic chemistry) The weak acid, H₂SO₃, present in a solution of sulfur dioxide in water; it is a reducing agent and mild bleach.

(chemistry) Any of various complex phenols extracted from the bark or galls of trees; used in tanning.

(chemistry) the hydrated form of tantalum oxide, Ta₂O₅

(chemistry) The hydrated form of tellurium oxide, H₆TeO₆, with some use as a reagent.

(biochemistry) The aldaric acid, 2,3 dihydroxy-succinic acid, that occurs naturally in many plants, in wine and in tamarind; it is used as the salts cream of tartar and Rochelle salt.

(chemistry) A poisonous unstable liquid, HSCN; its salts and esters, the thiocyanates, have a variety of uses.