opposability
/əˌpoʊzəˈbɪləti/
noun
- The quality of being able to be placed opposite something, especially a thumb that can touch the other fingers.
- Opposability is a key feature that helped early humans develop fine motor skills.
- The opposability of the human thumb allows us to grip tools easily.
- Primates are known for the opposability of their thumbs and big toes.