The word anatomy comes from the Greek ana-meaning up or through + tome meaning a cutting. Anatomy was once a cutting up because the structure of the body was originally learned through dissecting it. The word histology came from the Greek histo- meaning tissue + logos, treatise.
Definition: Reliability is the degree to which a measurement instrument gives the same results each time that it is used, assuming that the underlying thing being measured does not change.
1 The reliability of a measurement is the extent of unsystematic variation (random error) in the quantitative description of some characteristic of an individual when that individual is measured a number of times. 2  Reliability is the confidence that a measurement reflects a real or stable trait. 3  Importance of reliability.