Of or involving the cells of an organization or movement: The assessment of opposition to any totalitarian regime ... is notoriously difficult, for any effective movement must be secretive and cellular (Anthony Sampson). 4. Of or relating to a cellular telephone.
In the past, a human generation has been considered to be 20-25 years. Older genealogical documents will use these numbers. However, genealogical studies have revealed that this is too simplistic and can result in large inaccuracies during statistical calculation.
What's in a due date? Let's take a look at the history of determining due dates and how it affects when your baby will be born. Dr. Naegele, circa 1850, determined that the average length of human gestation was approximately 266 days from conception.