Tycho

American

[tahy-koh] / ˈtaɪ koʊ /

noun

a prominent crater in the third quadrant of the face of the moon, about 56 miles (90 km) in diameter.

Tycho British

/ ˈtaɪkəʊ /

noun

a relatively young crater in the SW quadrant of the moon, 4 km deep and 84 km in diameter, with a central peak. It is the centre of a conspicuous system of rays

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of Tycho

named after Tycho _Brahe

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

This process explains why ancient craters lack bright rays, while younger ones like Tycho, which formed about 108 million years ago, still display prominent streaks visible from Earth.

From Science Daily • Apr. 8, 2026

Lyons and others are being represented by Tycho & Zavareei, a leading consumer protection class-action law firm, as well as L.A.-based Clarkson Law.

From Los Angeles Times • May 22, 2023

To test the new system, the ngRADAR team turned toward the moon to image an Apollo landing site and the prominent Tycho Crater.

From Scientific American • Feb. 21, 2023

The craters Tycho, Kepler, or Copernicus work well.

From National Geographic Kids • Jun. 17, 2019

Although he was still a wealthy man in his own right, Tycho felt this to be the last straw, and made immediate plans to move on.

From "The Scientists" by John Gribbin

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023