yǎn​zhū

eyeball

眼珠 yǎn​zhū
eyeball noun
the physical globe of the eye as an anatomical structure

Due to extreme fatigue, his eyeballs were bloodshot.

eyes noun
one's eyes, especially when referring to their movement, expression, or gaze

Her eyes darted as she immediately thought of a way to respond.

Frequency

Movie subtitles
2.00 per million appears in 1% of films
Written text
2.54 per million

Sources

Definitions
CC-CEDICT