noun
Literal noun for the round eyeball itself; more concrete and sometimes more vivid or colloquial than simply 目.
猫の目玉が暗闇で光って見えた。
The cat's eyeballs seemed to glow in the dark.
noun
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)
この展覧会の目玉は、初公開の絵だ。
The centerpiece of this exhibition is a painting being shown for the first time.
新番組の目玉は豪華な出演者だ。
The main attraction of the new program is its star-studded cast.
noun
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)
今日のスーパーの目玉は、卵一パック98円だ。
Today's featured bargain at the supermarket is a pack of eggs for 98 yen.
年末セールの目玉として大型テレビを半額にした。
They made large TVs half price as the big draw for the year-end sale.
noun
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)
料理の注文で「目玉」と言えば、目玉焼きを指すことがある。
When ordering food, 目玉 can sometimes mean a fried egg sunny-side up.