The photoelectric effect is a phenomenon where a material emits electrons after absorbing light.

An electrooculogram is a test method to record the movement of the eyeball.

The doctor used an electrocardiograph to check the condition of my heart.

He measured muscle activity using an electromyograph.

I examined muscle activity using an electromyogram.

He achieved the Nine Gates in mahjong.

Sudden Infant Death Syndrome refers to the sudden death of an infant for which the cause remains unknown.