Source : WordNet®

Tb
     n 1: a metallic element of the rare earth group; used in lasers;
          occurs in apatite and monazite and xenotime and
          ytterbite [syn: {terbium}, {atomic number 65}]
     2: infection transmitted by inhalation or ingestion of tubercle
        bacilli and manifested in fever and small lesions (usually
        in the lungs but in various other parts of the body in
        acute stages) [syn: {tuberculosis}, {T.B.}]
     3: a unit of information equal to a trillion
        (1,099,511,627,776) bytes or 1024 gigabytes [syn: {terabyte},
         {T}]