The term 'twinkling of an eye' is a phrase used to describe something that happens very quickly. It is often used in the Bible to refer to the speed of God's actions. The crossword solutions for this phrase are SEC, which stands for 'SECOND, ' and SPLITSECOND, which refers to an even shorter period of time. Therefore, the phrase 'twinkling of an eye' can be interpreted to mean something that happens in a split SECOND.