opposable thumb

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op·pos·a·ble thumb

A thumb that can be placed opposite the fingers of the same hand. Opposable thumbs allow the digits to grasp and handle objects, and are characteristic of primates.
References in classic literature ?
But a dog, clutched by the neck from the back, can never be a match for two men, gifted with the intelligence and deftness of men, each of them two-handed with four fingers and an opposable thumb to each hand.
Of course we have the opposable thumb, our bipedalism, language, an asteroid, and other lucky twists of fate to thank as well, but imagination may be "the fragile foundation on which human society is built" (Catherine Brahic).
Second, the hand developed an opposable thumb, which transformed the primate hand into a proto-tool.
I believe that this hairless embryo with the aching oversize brain case and the opposable thumb, this animal barely up from the apes, will endure.
If the turning point of evolution was the biological miracle of the opposable thumb, it is all you need today to launch a satellite into space.
after all only the opposable thumb a mechanical aid to those who write
In order to create a functional hand, both Wood and Tada advocate the ablation of the hypoplastic digit, creation of three good digits with an opposable thumb as the preferable route in the reconstructive surgery algorithm.
In addition to using 3-D printing, the hand utilizes a unique differential pulley system to control the force of the hand's grip, as well as providing an opposable thumb.
The opposable thumb, anthropologists say, was a biological reason for the rise of Homo sapiens to the status of dominant species.
Interestingly, you need an opposable thumb in order to twist fibres or tie knots, so the ability of making cordage may have been an important advantage in human evolutionary development.
The opposable thumb and the clitoris have more nerve endings than any other place in our body, especially the clitoris.
Although bearing a long tail, she had several human characteristics, including an opposable thumb, short arms and legs, and forward facing eyes.