nodule

Five bars covered in nodules roll with the motion of the foot.

In the most common version of deep-sea mining, huge excavation robots scour the seabed for polymetallic nodules, small potato-sized clusters of key minerals such as cobalt and nickel.

Each nodule contains at its core a small piece of shell or fossil, which is surrounded by minerals growing like crystals on its surface.

The process is shockingly slow, with the average nodule estimated to grow at a rate of a few centimeters every million years, and the slowest at only a few millimeters in that time.

Mining involves tractor-sized vacuums attached by tubes to a ship above that suck nodules to the surface.

Doubtless, an eddy from this hole accounts for the deposit of snow and, by accretions, for the erection of the nodule.

There had been a little nodule in his brain as there was a little nodule in Oliver's throat.

The gland, which is seen as a nodule, is drawn forward with forceps.

The deep-seated variety starts from the superficial form, or it begins as a tubercle or nodule in the skin.

A nodule, more or less evident, is found near the border which is usually striate.