tortoiseshell


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

tortoiseshell 

Material used in the manufacture of spectacle frames. It is obtained from the shell plates of the hawksbill turtle. See plastic spectacle frame; spectacles.

tortoiseshell

a coat color in cats consisting of a mixture of black and shades of red to yellow, usually broken into large patches. The color can be found in a variety of cats, both long- and shorthaired, and specific breeds, such as Burmese. Tortoiseshell-and-white is another variety, called calico in the USA and chintz in the United Kingdom. Because the genes for black and orange (including shades from red to yellow) are carried on an X chromosome, but not the same one, only females can carry both colors. Males from similar breeding are either orange or black. There are isolated examples of tortoiseshell or tortoiseshell-and-white male cats, but almost all are sterile due to the chromosomal abnormality of XXY. These are considered models of the human condition, klinefelter's syndrome. Rarely, the phenomenon may be attributed to somatic mutations, crossing over of chromosomes or mosaicism.
References in periodicals archive ?
More than 20 sightings of the butterfly, also know as the yellow-legged tortoiseshell, were reported in several counties, mainly along the east coast around Norfolk but also as far as Tyneside, the charity said.
We have had a lot of requests from our customers who saw and loved his music video," said Clara Mercier, marketing manager for Thierry Lasry, who said the tortoiseshell version was a limited edition.
The numbers of common blue (main), and small tortoiseshell butterflies in Britain are falling but the meadow brown (above) is faring better
The small tortoiseshell used to be just about the commonest butterfly, and you would see it every year in your garden, but it has become quite scarce," Dr Brereton said.
com Animal print Animal print sunglasses Tortoiseshell Tortoiseshell Tortoiseshell glasses PS8 Tu @Sainsbury's Sainsbury's Sainsbury's PS6.
In contrast to the success of the peacock and the small tortoiseshell, the small white and large white - known popularly as cabbage white - butterflies lost their first and second positions respectively last year.
THE small tortoiseshell butterfly has continued to fight back against long-term declines this year, an annual survey has revealed.
Garden favourite the Small Tortoiseshell enjoyed its best year for a decade last summer, while Peacocks, Small and Large White also had good years, but migrants including Red Admiral and Painted Lady struggled.
ATTRACTS: Common Blue, Large Skipper, Meadow Brown, Painted Lady, Small Tortoiseshell, Small White.
While there are still plenty of signature Reger traits across the new collections, including tortoiseshell, animal print, purples and burgundies, and beautiful detailing, we've introduced more colour this season and made the shapes more pronounced to make some great statement eyewear.
Sweet Scarlet loves to be fussed and cuddled - she's the tortoiseshell and white one in the front hogging the limelight.
AW, Gosforth, Newcastle Night Wings THE tortoiseshell in the room Fluttering around the light As though it's an electric moon Flashes of orange On fragile wings Around in circles the butterfly goes Before settling on the blue wall Taking off again towards the window Out into the shadows of night The tortoiseshell flutters away Leaving behind a feeling of awe.