sentient

Short definition from Wiktionary

Adjective

1. 1
   Experiencing sensation, thought, or feeling.
2. 2
   Able to consciously perceive through the use of sense faculties.
3. 3
   Possessing human-like awareness and intelligence.

Noun

1. 1
   Lifeform with the capability to feel sensation, such as pain.
2. 2
   An intelligent, self-aware being.