From WordNet (r) 3.0 (2006):
T
n 1: a base found in DNA (but not in RNA) and derived from
pyrimidine; pairs with adenine [syn: thymine, T]
2: one of the four nucleotides used in building DNA; all four
nucleotides have a common phosphate group and a sugar
(ribose) [syn: deoxythymidine monophosphate, T]
3: a unit of weight equivalent to 1000 kilograms [syn: metric
ton, MT, tonne, t]
4: the 20th letter of the Roman alphabet [syn: T, t]
5: 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 [syn: triiodothyronine, liothyronine, T]
6: hormone produced by the thyroid glands to regulate metabolism
by controlling the rate of oxidation in cells; "thyroxine is
65% iodine" [syn: thyroxine, thyroxin,
tetraiodothyronine, T]