tortoiseshell

American  

[tawr-tuhs-shel] / ˈtɔr təsˌʃɛl /

noun

1. a horny substance of a mottled brown and yellow coloration, composing the laminae that cover the inner body plates of the carapace of certain tortoises or turtles, especially the hawksbill, used for making combs and ornamental articles, inlaying, etc.

2. any synthetic substance made to look like natural tortoiseshell.

3. Also tortoiseshell butterfly any of several nymphalid butterflies of the genus Nymphalis, as N. californica, having variegated markings of red, yellow, or orange on the wings.

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adjective

1. mottled or variegated like tortoiseshell, especially with yellow and brown and sometimes other colors.

2. made of tortoiseshell.

tortoiseshell British  

/ ˈtɔːtəsˌʃɛl /

noun

1. a horny translucent yellow-and-brown mottled substance obtained from the outer layer of the shell of the hawksbill turtle: used for making ornaments, jewellery, etc

2. a similar synthetic substance, esp plastic or celluloid, now more widely used than the natural product

3. a breed of domestic cat, usually female, having black, cream, and brownish markings

4. any of several nymphalid butterflies of the genus Nymphalis, and related genera, having orange-brown wings with black markings

5. another name for hawksbill turtle

6. 1. a yellowish-brown mottled colour

   2. ( as adjective )

      a tortoiseshell décor

7. (modifier) made of tortoiseshell

   a tortoiseshell comb

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Etymology

Origin of tortoiseshell

First recorded in 1595–1605; tortoise + shell

Example Sentences

One large tortoiseshell was spotted in woodland near Ashford, Kent by Trevor Collett.

From BBC • Mar. 10, 2026

He was a scholarly analyst who wore tortoiseshell reading glasses and made friends throughout the energy industry.

From The Wall Street Journal • Dec. 17, 2025

The white-and-brown animal stands fish-eyed and proud beside Ebsen, who wears a subtly glamorous ensemble of bell-bottom jeans, dark V-neck tee, and tortoiseshell Prada sunglasses.

From Los Angeles Times • Apr. 9, 2025

Scientists have long been fascinated by tortoiseshell and calico cats: the offspring of a black cat and an orange cat.

From Science Magazine • Nov. 27, 2024

She’s dressed to the nines like always, in a color-splashed Floating Dress that makes her look like a billowy sunset, and enormous tortoiseshell movie-star sunglasses.

From "I'll Give You the Sun" by Jandy Nelson