cat's eye

• cat's-eye
• catseye

In mineralogy, a calque of French œil de chat.

Cat's eyes (road markings)

Cat's eyes (marbles)

cat's eye (countable and uncountable, plural cats' eyes)

1. (countable, Britain, Ireland, New Zealand, Australia, usually in the plural) A retroreflective device placed on a road surface as a marking that can be seen even at night.
2. (countable) A glass marble with elongated colourful inclusions running through its axis.

   Synonym: cat-eye

3. A gemstone exhibiting chatoyancy.
4. (mineralogy) Cymophane (translucent yellow chatoyant chrysoberyl).
5. (countable, New Zealand) Lunella smaragda
6. Used other than figuratively or idiomatically: see cat,‎ eye.; the eye of a cat.

• cat-eyes