THORAX • FREE TRANSLATOR.ORG • Definition of Thorax

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/θˈɔræks/ Listen

noun

Thorax n.

(Anat.) The part of the trunk between the neck and the abdomen, containing that part of the body cavity the walls of which are supported by the dorsal vertebrae, the ribs, and the sternum, and which the heart and lungs are situated; the chest. Note: In mammals the thoracic cavity is completely separated from the abdominal by the diaphragm, but in birds and many reptiles the separation is incomplete, while in other reptiles, and in amphibians and fishes, there is no marked separation and no true thorax.

(Zool.)

(a)

The middle region of the body of an insect, or that region which bears the legs and wings. It is composed of three united somites, each of which is composed of several distinct parts.

(b)

The second, or middle, region of the body of a crustacean, arachnid, or other articulate animal. In the case of decapod Crustacea, some writers include under the term thorax only the three segments bearing the maxillipeds; others include also the five segments bearing the legs.

(Antiq.) A breastplate, cuirass, or corselet; especially, the breastplate worn by the ancient Greeks.

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Etymology of 'Thorax'

Collaborative International Dictionary of English 0.48

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"Thorax" Quotes from Famous Books

... French have the expression "Naked as a worm," to point to the lack of any defensive covering. Now the Lampyris is clothed, that is to say, he wears an epidermis of some consistency; moreover, he is rather richly coloured: his body is dark brown all over, set off with pale pink on the thorax, especially on the lower surface. Finally, each segment is decked at the hinder edge with two spots of a fairly bright red. A costume like this was never worn by ...

— The Glow-Worm and Other Beetles • Jean Henri Fabre

... the hot regions of the five continents. About two hundred species have been distinguished. Some are quite small, others six inches long. Some are dark-brown, others reddish, and others again straw-yellow, as in Baluchistan. The body consists of a head and thorax without joints, and a hinder part of seven articulated rings, besides six tail rings. The last ring, the thirteenth, contains two poison glands and is furnished with a sting as fine as a needle. The poison is a fluid ...

— From Pole to Pole - A Book for Young People • Sven Anders Hedin

... to twenty-two, thirteen, and even fewer; and accompanying this there is a shortening or integration of the whole body, reaching its extreme in crabs and spiders. Similarly with the development of an individual crustacean or insect. The thorax of a lobster, which, in the adult, forms, with the head, one compact box containing the viscera, is made up by the union of a number of segments which in the embryo were separable. The thirteen distinct divisions seen ...

— Essays: Scientific, Political, & Speculative, Vol. I • Herbert Spencer

... is a mathematician and knows something about magnetism, he suggested making a very thin needle into a magnet; then breaking it into very short pieces, which would still be magnetic, and fastening one of these pieces with some cement on the thorax of the insect to be ...

— More Letters of Charles Darwin - Volume I (of II) • Charles Darwin

... year or eighteen months of life, the rounded infantile shape of body persists. The limbs are short and thick, the cheeks full and rounded, the thorax and pelvis are small, the abdomen relatively large and full. The great adipose deposit in the subcutaneous tissue serves as a depot in which water is stored in large amounts. In the healthy child of normal development by the end of the second year a great change has taken place. The shape ...

— The Nervous Child • Hector Charles Cameron

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