What it means
The ending for the act of taking a recording or picture. Mammography takes X-ray images of the breast, angiography images blood vessels using contrastKON-trastA dye or other substance given before an imaging test so body parts show up more clearly.Full entry dye, and electroencephalography records the brain's electrical activity. The picture or tracing itself ends in -gram, as in a mammogram, and the machine often ends in -graph.
Remember it
Graph is write: -graphy is the writing, -gram is what got written.