Nodule

The MRI showed a nodule in the patient's lung.

We're going to have to do a biopsy on the nodule.

They found a nodule on Mary's thyroid.

Biotics manipulate mass effect fields using dozens of element zero nodules within their nervous system that react to electric stimuli from the brain. Amplifiers allow biotics to synchronize the nodules so they can form fields large and strong enough for practical use.