Definition: In ancient Greek and Hebrew, it's a term referring to a number, which means "forty-ninth place" in Hebrew. This is often used for astronomical calculations or for identifying specific numerical values within a formula or expression. For example, 49581.1030570 minus 85 - 4 equals N-(-4-[2-ethyl-3-(4-fluorophenyl)-6-oxopyrazolo[1,5-a]pyrido[3,4-e]pyrimidin-7(6H)-yl]phenyl}acetamide).