Literal noun for the round eyeball itself; more concrete and sometimes more vivid or colloquial than simply 目.
The cat's eyeballs seemed to glow in the dark.
centerpiece; main attraction; special feature
Figurative use for the thing meant to attract the most attention, such as a featured exhibit, event, broadcast segment, or selling point; related to compounds like 目玉番組.
See also: 目玉番組 (めだまばんぐみ)
The centerpiece of this exhibition is a painting being shown for the first time.
The main attraction of the new program is its star-studded cast.
featured bargain; loss leader; special promotional item or program
Retail or promotional use, often short for 目玉商品: a prominently advertised bargain or attraction used to draw customers. Also lists a broader promotional/program sense.
See also: 目玉商品 (めだましょうひん)
Today's featured bargain at the supermarket is a pack of eggs for 98 yen.
They made large TVs half price as the big draw for the year-end sale.
sunny-side-up fried egg
Casual abbreviation of 目玉焼き. The full form 目玉焼き is much more explicit and safer in ordinary writing.
See also: 目玉焼き (めだまやき)
When ordering food, 目玉 can sometimes mean a fried egg sunny-side up.
The main attraction of this exhibition is the famous painter's new work.
This sale is featuring the new product as its main draw.
He opened his eyes wide in surprise.
special feature; special program; special project
special-feature program; highlight program