A statement which refers to itself.

Raised skin, usually caused by the involuntary erection of hairs on the neck or arms caused by cold, excitement, or fear.

(grammar) In English: a personal pronoun, having a form of "self" as a suffix to show that the subject's action affects the subject itself.

A response, to a stimulus, that has been acquired by operant conditioning.

a reflex in infants in which the head is turned towards any stimulus; used to find the nipple

A verb whose subject and direct object are the same.

plural of patellar reflex

The reflex which causes a bent knee to kick when the tendon below the patella (kneecap) is tapped.

plural of reflexive pronoun

(medicine) A tool used by physician to hit the body and test for certain reflexes.