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Opposable thumb Meaning: Definition, Examples, and Translations

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opposable thumb

[əˈpəʊzəbl θʌm ]

Definition

Context #1 | Noun

anatomy

A thumb that can be placed opposite the fingers of the same hand, allowing for fine motor skills and precision grip.

Synonyms

articulated thumb, flexible thumb, mobile thumb.

Which Synonym Should You Choose?

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Word Description / Examples
opposable thumb

This term is often used in biology and anthropology to describe a thumb that can touch the fingertips of the same hand, allowing for grasping and manipulating objects. It's important in discussions about human evolution and the capabilities of primates.

  • Humans and some primates have an opposable thumb, which allows them to grip objects with precision.
  • The opposable thumb is a key feature in the study of human evolution.
flexible thumb

This term is generally used to highlight the ability of the thumb to bend and flex easily. It can be used in both biological and everyday contexts to describe the range of motion and ease of movement.

  • She has a very flexible thumb, which makes playing the guitar easier for her.
  • A flexible thumb can help in performing various hand tasks with greater ease.
mobile thumb

Typically used to emphasize the thumb's capability to move in different directions and perform a wide range of tasks. This term can be applied in general conversations as well as in medical or ergonomic contexts.

  • Having a mobile thumb is crucial for tasks that require fine motor skills.
  • After the injury, he worked hard to regain a mobile thumb.
articulated thumb

This phrase is typically used in biomechanics, robotics, or prosthetics to describe a thumb that is designed or engineered to bend and move at its joints, mimicking natural human movement.

  • The new prosthetic hand features an articulated thumb that moves like a natural thumb.
  • Engineers are working on a robotic hand with an articulated thumb for better dexterity.

Examples of usage

  • Primates, including humans, have opposable thumbs which distinguish them from other animals.
  • The opposable thumb is crucial for tasks such as writing, grasping small objects, and using tools.
  • Opposable thumbs provide humans with a significant advantage in manipulating objects and performing intricate tasks.
  • The opposable thumb allows for the precision grip needed for activities like sewing and playing musical instruments.
  • Having an opposable thumb is considered a defining characteristic of primates.

Translations

To see the translation, please select a language from the options available.

Origin of 'opposable thumb'

The opposable thumb is a unique feature of primates, including humans, that has evolved over millions of years. It allows for a wide range of movements and functions, contributing to the dexterity and versatility of the hand. The opposable thumb played a significant role in the development of early tools and technologies, enabling humans to manipulate objects and create complex structures. Its evolutionary history is closely linked to the success of primates in adapting to various environments and mastering fine motor skills.