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.
Both 100 years and 40 years are a generation in the Bible. However, the average of these two, 70 years, is on occasion also found in the bible, (Psalm 90:10). But 70 years is a generation according to the average age of a man at his death, rather then when his first child is born (as with the example of Abraham).