| the alphabet evolved by the ancient Romans which serves for writing most of the languages of western Europe | thyroid hormone similar to thyroxine but with one less iodine atom per molecule and produced in smaller quantity; exerts the same biological effects as thyroxine but is more potent and briefer |
| | hormone produced by the thyroid glands to regulate metabolism by controlling the rate of oxidation in cells |
| | the 20th letter of the Roman alphabet |
| | one of the four nucleotides used in building DNA, also known as 5'-thymidylate, thymidylate, or TMP; all four nucleotides have a common phosphate group and a sugar (ribose) |
| | a base found in DNA (but not in RNA) and derived from pyrimidine; pairs with adenine |