Tuberculosis, miliary
The presence of numerous sites of tuberculosis infection each of which is minute, due to dissemination of infected material through the bloodstream in a process somewhat like the metastasis of a malignancy.
The word 'miliary' is a botanical borrowing by medicine and refers to the millet seed.
Millet is a small-grained rather inferior cereal grass.
Its seed measures about 2 millimeters in diameter