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}, {Tb}, {atomic number 65}]

2: infection by the tubercle bacillus manifesting itself in

lesions of various parts of the body (especially the lungs

and bones) [syn: {tuberculosis}, {TB}, {T.B.}]

3: a unit of information equal to one trillion

(1,000,000,000,000) bytes [syn: {terabyte}, {Terabyte}, {T},

{Tb}, {TB}]