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| the largest tarsal bone, forming the prominence of the heel. |
| the flat, movable bone at the front of the knee; kneecap. |
| brain wave | |
| —n | |
| alpha rhythm beta rhythm See also delta rhythm any of the fluctuations of electrical potential in the brain as represented on an electroencephalogram. They vary in frequency from 1 to 30 hertz | |
brain wave n.
A rhythmic fluctuation of electric potential between parts of the brain, as seen on an electroencephalogram.