eyecup

noun

eye·​cup ˈī-ˌkəp 

1

: a small oval cup with a rim curved to fit the orbit of the eye used for applying liquid remedies to the eyes

2

: optic cup

3

: a usually rubber cup at the eyepiece of an optical instrument (such as binoculars) for keeping out extraneous light

Examples of eyecup in a Sentence

Recent Examples on the Web

Looking to the rear, the R6 has Rate/Color and Menu squeezed into the top left corner, in between the EVF eyecup and the LCD. — PC Magazine, 1 Dec. 2025

The twist-up eyecups also help to block out external lights, allowing for a more immersive stargazing experience. — Kat Bayly, Space.com, 24 Nov. 2025

With a 10x optical zoom that’s crystal clear, comfortable rubber eyecups, and a removable wrist strap, this is the ultimate educational toy for young explorers to take to their favorite nature spots or even the front yard. — Toby Rose, Parents, 24 Oct. 2024

Word History

First Known Use

1586, in the meaning defined at sense 1

Rhymes for eyecup

• buttercup
• backup
• blowup
• breakup
• buildup
• checkup
• cleanup
• holdup
• hookup
• lineup
• lockup
• makeup

Kids Definition

eyecup

noun

eye·​cup ˈī-ˌkəp 

: a small oval cup with a rim curved to fit the orbit of the eye and used for applying liquid medicine to the eyes

Medical Definition

eyecup

noun

eye·​cup ˈī-ˌkəp 

1

: a small oval cup with a rim curved to fit the orbit of the eye used for applying liquid remedies to the eyes

2

: optic cup